<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:7904acd5-0a92-443e-a9f8-427ab84c7028,g:2321a6ab-9c92-4338-be68-cb2cb519dc46-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.embecta.com/role/CondensedConsolidatedStatementsofEquity" xlink:type="simple" xlink:href="embc-20250331.xsd#CondensedConsolidatedStatementsofEquity"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/CondensedConsolidatedStatementsofEquity" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_dbb70092-1b85-4450-b1a6-468ab1f80438" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_b662dda0-9de6-4c6d-beb2-bba0861d0cc1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_dbb70092-1b85-4450-b1a6-468ab1f80438" xlink:to="loc_us-gaap_StatementTable_b662dda0-9de6-4c6d-beb2-bba0861d0cc1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5f867da2-d502-435b-95e3-f3b1ed14bfcd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_b662dda0-9de6-4c6d-beb2-bba0861d0cc1" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5f867da2-d502-435b-95e3-f3b1ed14bfcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5f867da2-d502-435b-95e3-f3b1ed14bfcd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5f867da2-d502-435b-95e3-f3b1ed14bfcd" xlink:to="loc_us-gaap_EquityComponentDomain_5f867da2-d502-435b-95e3-f3b1ed14bfcd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5f867da2-d502-435b-95e3-f3b1ed14bfcd" xlink:to="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_5d52f9ef-bb40-40b8-a6f6-991df575d66d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:to="loc_us-gaap_CommonStockMember_5d52f9ef-bb40-40b8-a6f6-991df575d66d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_015eaffa-f056-43cc-bb86-e4b39c891ef3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_015eaffa-f056-43cc-bb86-e4b39c891ef3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_2adeb322-57e6-4490-9065-bffe992f958a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:to="loc_us-gaap_RetainedEarningsMember_2adeb322-57e6-4490-9065-bffe992f958a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ba370e3e-e3af-4e50-b29c-4d0b67a7ebd9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_87b71bfb-1102-4f83-9e16-0923fed47ee6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ba370e3e-e3af-4e50-b29c-4d0b67a7ebd9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_dbb70092-1b85-4450-b1a6-468ab1f80438" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_eef2742c-a728-442a-8cfb-c61256152b71" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_eef2742c-a728-442a-8cfb-c61256152b71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_29caf8eb-bf53-41cd-bce3-c2444555fbb5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_StockholdersEquity_29caf8eb-bf53-41cd-bce3-c2444555fbb5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_1e3ff1e4-af91-4d8f-ac75-5a1eeffb5611" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_NetIncomeLoss_1e3ff1e4-af91-4d8f-ac75-5a1eeffb5611" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c22d5818-efb0-44c5-afe8-707939894c01" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c22d5818-efb0-44c5-afe8-707939894c01" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_bcaf0118-dadc-461f-b943-a15e00be24b6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_bcaf0118-dadc-461f-b943-a15e00be24b6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_e6c78525-eb0d-459b-87a9-ba02273a0bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_DividendsCommonStock_e6c78525-eb0d-459b-87a9-ba02273a0bb4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_8dbd4e23-668f-4437-9463-4dfe1a7338c3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_8dbd4e23-668f-4437-9463-4dfe1a7338c3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_98d42ba1-81c0-4518-a0c2-e28f32e15abd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_a890a053-5c26-46fc-b94f-2e9baf156f8a" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_98d42ba1-81c0-4518-a0c2-e28f32e15abd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_3d0ac1d1-528c-47b5-b689-703420ea0d75" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_e40805de-d8e2-4324-8f45-1ce72d688bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/ThirdPartyArrangementsandRelatedPartyDisclosuresDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#ThirdPartyArrangementsandRelatedPartyDisclosuresDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/ThirdPartyArrangementsandRelatedPartyDisclosuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_88539b45-d1e3-470d-8bba-3bbeac12270d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_cc41e217-84f9-40aa-8689-331d55dbc0f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_88539b45-d1e3-470d-8bba-3bbeac12270d" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_cc41e217-84f9-40aa-8689-331d55dbc0f1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_aecfb971-abb1-465b-aa62-25afff68b1eb" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_cc41e217-84f9-40aa-8689-331d55dbc0f1" xlink:to="loc_srt_CounterpartyNameAxis_aecfb971-abb1-465b-aa62-25afff68b1eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_aecfb971-abb1-465b-aa62-25afff68b1eb_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_aecfb971-abb1-465b-aa62-25afff68b1eb" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_aecfb971-abb1-465b-aa62-25afff68b1eb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_246eb720-b3e2-4cff-b359-ad90208d0b09" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_aecfb971-abb1-465b-aa62-25afff68b1eb" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_246eb720-b3e2-4cff-b359-ad90208d0b09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_BectonDickinsonAndCompanyMember_87965b07-9635-49d0-a53b-44dce1954c8d" xlink:href="embc-20250331.xsd#embc_BectonDickinsonAndCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_246eb720-b3e2-4cff-b359-ad90208d0b09" xlink:to="loc_embc_BectonDickinsonAndCompanyMember_87965b07-9635-49d0-a53b-44dce1954c8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_cc41e217-84f9-40aa-8689-331d55dbc0f1" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_6609343e-3e54-4ff2-9e7d-d57a4dc8ce0c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_OtherReceivablesNetCurrentMember_2b2c758c-8d50-45f1-a457-507a07605070" xlink:href="embc-20250331.xsd#embc_OtherReceivablesNetCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:to="loc_embc_OtherReceivablesNetCurrentMember_2b2c758c-8d50-45f1-a457-507a07605070" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeAccountsReceivableMember_10c10c73-1b69-4b66-97af-305b5a744285" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TradeAccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:to="loc_us-gaap_TradeAccountsReceivableMember_10c10c73-1b69-4b66-97af-305b5a744285" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_AccountsPayableOtherCurrentMember_705e3289-0a34-4a59-9ce9-480b0386f9dc" xlink:href="embc-20250331.xsd#embc_AccountsPayableOtherCurrentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:to="loc_embc_AccountsPayableOtherCurrentMember_705e3289-0a34-4a59-9ce9-480b0386f9dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableMember_81dde0c7-becc-4acc-a38d-6f4c3d37bab4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_b3fea28c-6447-4cd5-abbc-858faefa57ae" xlink:to="loc_us-gaap_AccountsPayableMember_81dde0c7-becc-4acc-a38d-6f4c3d37bab4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_09d62ed9-55b1-454b-83ca-dd776a4335ff" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_88539b45-d1e3-470d-8bba-3bbeac12270d" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_09d62ed9-55b1-454b-83ca-dd776a4335ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableOtherCurrent_a6478a04-4220-4a7f-b306-899e64c96181" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsPayableOtherCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_88539b45-d1e3-470d-8bba-3bbeac12270d" xlink:to="loc_us-gaap_AccountsPayableOtherCurrent_a6478a04-4220-4a7f-b306-899e64c96181" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/BusinessRestructuringChargesNarrativeDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#BusinessRestructuringChargesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/BusinessRestructuringChargesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_627a841a-a148-4bf1-b10f-235660b98dd4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_acba2c0f-dbca-44a3-8c02-253e806fca67" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_627a841a-a148-4bf1-b10f-235660b98dd4" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_acba2c0f-dbca-44a3-8c02-253e806fca67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_97a2d437-1a93-4051-a25c-e18314cd4e70" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_acba2c0f-dbca-44a3-8c02-253e806fca67" xlink:to="loc_srt_RangeAxis_97a2d437-1a93-4051-a25c-e18314cd4e70" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_97a2d437-1a93-4051-a25c-e18314cd4e70_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_97a2d437-1a93-4051-a25c-e18314cd4e70" xlink:to="loc_srt_RangeMember_97a2d437-1a93-4051-a25c-e18314cd4e70_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2002b22f-629f-4dc4-9b8f-ba51a8e2a8ba" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_97a2d437-1a93-4051-a25c-e18314cd4e70" xlink:to="loc_srt_RangeMember_2002b22f-629f-4dc4-9b8f-ba51a8e2a8ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_d9a4ed6a-926c-4867-9e96-d32e1b4c27c2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2002b22f-629f-4dc4-9b8f-ba51a8e2a8ba" xlink:to="loc_srt_MinimumMember_d9a4ed6a-926c-4867-9e96-d32e1b4c27c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a81b18e5-c238-48a1-b4c8-7abfd5b4d5ec" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2002b22f-629f-4dc4-9b8f-ba51a8e2a8ba" xlink:to="loc_srt_MaximumMember_a81b18e5-c238-48a1-b4c8-7abfd5b4d5ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_d46c96a0-24c8-4a10-b042-953c9c47f51d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_acba2c0f-dbca-44a3-8c02-253e806fca67" xlink:to="loc_us-gaap_RestructuringPlanAxis_d46c96a0-24c8-4a10-b042-953c9c47f51d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_d46c96a0-24c8-4a10-b042-953c9c47f51d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_d46c96a0-24c8-4a10-b042-953c9c47f51d" xlink:to="loc_us-gaap_RestructuringPlanDomain_d46c96a0-24c8-4a10-b042-953c9c47f51d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_d5a612e6-5b48-481d-a601-25fa16ac6bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_d46c96a0-24c8-4a10-b042-953c9c47f51d" xlink:to="loc_us-gaap_RestructuringPlanDomain_d5a612e6-5b48-481d-a601-25fa16ac6bf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_PatchPumpRestructuringPlanMember_380d126d-ba07-4a2b-8ae5-70307c82a514" xlink:href="embc-20250331.xsd#embc_PatchPumpRestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_d5a612e6-5b48-481d-a601-25fa16ac6bf7" xlink:to="loc_embc_PatchPumpRestructuringPlanMember_380d126d-ba07-4a2b-8ae5-70307c82a514" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A2025RestructuringPlanMember_217cdbbf-0926-4436-b7ca-216a59e36a2b" xlink:href="embc-20250331.xsd#embc_A2025RestructuringPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_d5a612e6-5b48-481d-a601-25fa16ac6bf7" xlink:to="loc_embc_A2025RestructuringPlanMember_217cdbbf-0926-4436-b7ca-216a59e36a2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_9f8d1d91-1d2f-4a2e-8111-645a15863f45" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringAndRelatedCostExpectedCost1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_627a841a-a148-4bf1-b10f-235660b98dd4" xlink:to="loc_us-gaap_RestructuringAndRelatedCostExpectedCost1_9f8d1d91-1d2f-4a2e-8111-645a15863f45" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/BusinessRestructuringChargesScheduleofRestructuringandRelatedCostsDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#BusinessRestructuringChargesScheduleofRestructuringandRelatedCostsDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/BusinessRestructuringChargesScheduleofRestructuringandRelatedCostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_c29d6333-cfd2-435b-b60e-1107a8f2ea2a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1eff22ad-e31c-4a02-bc7d-582a5ecda8f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_c29d6333-cfd2-435b-b60e-1107a8f2ea2a" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1eff22ad-e31c-4a02-bc7d-582a5ecda8f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e46cac86-13be-4b42-a300-a62123782879" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1eff22ad-e31c-4a02-bc7d-582a5ecda8f5" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e46cac86-13be-4b42-a300-a62123782879" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e46cac86-13be-4b42-a300-a62123782879_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e46cac86-13be-4b42-a300-a62123782879" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e46cac86-13be-4b42-a300-a62123782879_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e46cac86-13be-4b42-a300-a62123782879" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_e5a67f86-a7a8-4245-8bee-27582d051ae3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:to="loc_us-gaap_CostOfSalesMember_e5a67f86-a7a8-4245-8bee-27582d051ae3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_6a977247-9fdc-424c-97e3-c1ca3ec40040" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_6a977247-9fdc-424c-97e3-c1ca3ec40040" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_00ca9057-e0c5-4194-befe-5a2ae2d19515" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_00ca9057-e0c5-4194-befe-5a2ae2d19515" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_c51624c0-6504-423e-b58d-c91b83c49869" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a4000148-2e79-4057-814a-0bdc09bf818d" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_c51624c0-6504-423e-b58d-c91b83c49869" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1eff22ad-e31c-4a02-bc7d-582a5ecda8f5" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_11d98b7a-5aa4-4356-8b1e-df3c6aa6e294" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_7f2872f1-5ece-4782-bafb-3aa1bc67d5ed" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_11d98b7a-5aa4-4356-8b1e-df3c6aa6e294" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_17cbc40f-0951-4869-9d54-352fdc122717" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_11d98b7a-5aa4-4356-8b1e-df3c6aa6e294" xlink:to="loc_us-gaap_EmployeeSeveranceMember_17cbc40f-0951-4869-9d54-352fdc122717" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_4c532a29-0ed4-46a9-815b-1b559a3f9fca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_11d98b7a-5aa4-4356-8b1e-df3c6aa6e294" xlink:to="loc_us-gaap_OtherRestructuringMember_4c532a29-0ed4-46a9-815b-1b559a3f9fca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_c858509a-27c4-450b-8dcc-226df9dbd179" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_c29d6333-cfd2-435b-b60e-1107a8f2ea2a" xlink:to="loc_us-gaap_RestructuringCharges_c858509a-27c4-450b-8dcc-226df9dbd179" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/BusinessRestructuringChargesScheduleofRestructuringLiabilityActivityDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#BusinessRestructuringChargesScheduleofRestructuringLiabilityActivityDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/BusinessRestructuringChargesScheduleofRestructuringLiabilityActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_ac4ca333-df75-40d1-82f3-77354446f6f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a23d8353-0eb2-40ad-8e71-aa1b634e7c6c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ac4ca333-df75-40d1-82f3-77354446f6f3" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a23d8353-0eb2-40ad-8e71-aa1b634e7c6c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveAxis_09376e3d-b66b-4171-b35e-ff4c0f569587" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCostAndReserveAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a23d8353-0eb2-40ad-8e71-aa1b634e7c6c" xlink:to="loc_us-gaap_RestructuringCostAndReserveAxis_09376e3d-b66b-4171-b35e-ff4c0f569587" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_09376e3d-b66b-4171-b35e-ff4c0f569587_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_09376e3d-b66b-4171-b35e-ff4c0f569587" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_09376e3d-b66b-4171-b35e-ff4c0f569587_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfRestructuringDomain_5b3cfe57-112c-4160-a356-686f5beea2e4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TypeOfRestructuringDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringCostAndReserveAxis_09376e3d-b66b-4171-b35e-ff4c0f569587" xlink:to="loc_us-gaap_TypeOfRestructuringDomain_5b3cfe57-112c-4160-a356-686f5beea2e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeSeveranceMember_924da4a8-78db-4b2f-b43a-3091b88d7a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeSeveranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_5b3cfe57-112c-4160-a356-686f5beea2e4" xlink:to="loc_us-gaap_EmployeeSeveranceMember_924da4a8-78db-4b2f-b43a-3091b88d7a7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherRestructuringMember_4c86327c-9877-4647-bd44-72f9a5476760" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherRestructuringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfRestructuringDomain_5b3cfe57-112c-4160-a356-686f5beea2e4" xlink:to="loc_us-gaap_OtherRestructuringMember_4c86327c-9877-4647-bd44-72f9a5476760" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_997fe4ee-659c-448b-9528-dde2867a324c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_a23d8353-0eb2-40ad-8e71-aa1b634e7c6c" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_997fe4ee-659c-448b-9528-dde2867a324c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_997fe4ee-659c-448b-9528-dde2867a324c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_997fe4ee-659c-448b-9528-dde2867a324c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_997fe4ee-659c-448b-9528-dde2867a324c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_df0d5678-01ae-4ed8-841d-204beb7227a9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_997fe4ee-659c-448b-9528-dde2867a324c" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_df0d5678-01ae-4ed8-841d-204beb7227a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SalariesWagesAndRelatedItemsMember_571bc314-e081-4cd2-b0f6-bdfbe8c53c93" xlink:href="embc-20250331.xsd#embc_SalariesWagesAndRelatedItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_df0d5678-01ae-4ed8-841d-204beb7227a9" xlink:to="loc_embc_SalariesWagesAndRelatedItemsMember_571bc314-e081-4cd2-b0f6-bdfbe8c53c93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesMember_a10a4be5-ee06-4c95-8645-f9d76ae440a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_df0d5678-01ae-4ed8-841d-204beb7227a9" xlink:to="loc_us-gaap_AccruedLiabilitiesMember_a10a4be5-ee06-4c95-8645-f9d76ae440a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserveRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_ac4ca333-df75-40d1-82f3-77354446f6f3" xlink:to="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_e7fdda3f-82d5-449d-a427-ca3d4bca407e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:to="loc_us-gaap_RestructuringReserve_e7fdda3f-82d5-449d-a427-ca3d4bca407e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_c02cad1e-dcc5-4573-acb8-ce8c1f0b9600" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:to="loc_us-gaap_RestructuringCharges_c02cad1e-dcc5-4573-acb8-ce8c1f0b9600" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_e2cc3104-968a-4d88-a8b3-3835f8eecca6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:to="loc_us-gaap_PaymentsForRestructuring_e2cc3104-968a-4d88-a8b3-3835f8eecca6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserveAccrualAdjustment1_5ad12b7a-9bf1-4197-949a-f77231032ad0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserveAccrualAdjustment1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringReserveRollForward_a3faf81b-17a2-4d1b-a8b0-60ee597e170b" xlink:to="loc_us-gaap_RestructuringReserveAccrualAdjustment1_5ad12b7a-9bf1-4197-949a-f77231032ad0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_31be7880-e85a-4230-bdf8-8a76b80fb8fe" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RestructuringReserve"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/SegmentandGeographicalDataScheduleofRevenuesbyGeographicalRegionDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#SegmentandGeographicalDataScheduleofRevenuesbyGeographicalRegionDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/SegmentandGeographicalDataScheduleofRevenuesbyGeographicalRegionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_666887ce-e201-47ba-98b6-7e110cb29bac" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_969361e6-ca13-46e3-a1fa-bd736f24faa5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_666887ce-e201-47ba-98b6-7e110cb29bac" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_969361e6-ca13-46e3-a1fa-bd736f24faa5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_a43d5984-cd3f-4e08-b1af-81fd0216d07f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_969361e6-ca13-46e3-a1fa-bd736f24faa5" xlink:to="loc_srt_StatementGeographicalAxis_a43d5984-cd3f-4e08-b1af-81fd0216d07f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_a43d5984-cd3f-4e08-b1af-81fd0216d07f_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_a43d5984-cd3f-4e08-b1af-81fd0216d07f" xlink:to="loc_srt_SegmentGeographicalDomain_a43d5984-cd3f-4e08-b1af-81fd0216d07f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_5af9f76e-52a9-418d-939a-7ca8b66eaf7c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_a43d5984-cd3f-4e08-b1af-81fd0216d07f" xlink:to="loc_srt_SegmentGeographicalDomain_5af9f76e-52a9-418d-939a-7ca8b66eaf7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_13267ac6-1df8-444d-b4a4-00193461d1c7" xlink:href="https://xbrl.sec.gov/country/2024/country-2024.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_5af9f76e-52a9-418d-939a-7ca8b66eaf7c" xlink:to="loc_country_US_13267ac6-1df8-444d-b4a4-00193461d1c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_c5e3db5c-cdea-4543-9eca-c1c9297763ed" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NonUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_5af9f76e-52a9-418d-939a-7ca8b66eaf7c" xlink:to="loc_us-gaap_NonUsMember_c5e3db5c-cdea-4543-9eca-c1c9297763ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_937c2fc1-c241-49d5-a9ca-2bdfa8ffb030" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_666887ce-e201-47ba-98b6-7e110cb29bac" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_937c2fc1-c241-49d5-a9ca-2bdfa8ffb030" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/SegmentGeographicalDataScheduleofRevenuesbyProductFamilyDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#SegmentGeographicalDataScheduleofRevenuesbyProductFamilyDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/SegmentGeographicalDataScheduleofRevenuesbyProductFamilyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_640b3d4b-c19c-4350-aa16-8568f8e7b343" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3d6f7e0f-d222-469d-bf63-d34640fe19a4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_640b3d4b-c19c-4350-aa16-8568f8e7b343" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3d6f7e0f-d222-469d-bf63-d34640fe19a4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_6e63825e-1b90-46ea-83e1-53ef991bf1b0" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_3d6f7e0f-d222-469d-bf63-d34640fe19a4" xlink:to="loc_srt_ProductOrServiceAxis_6e63825e-1b90-46ea-83e1-53ef991bf1b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6e63825e-1b90-46ea-83e1-53ef991bf1b0_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_6e63825e-1b90-46ea-83e1-53ef991bf1b0" xlink:to="loc_srt_ProductsAndServicesDomain_6e63825e-1b90-46ea-83e1-53ef991bf1b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_6e63825e-1b90-46ea-83e1-53ef991bf1b0" xlink:to="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_PenNeedlesMember_f643b491-ff8b-4d18-8a3b-d40f5d24f962" xlink:href="embc-20250331.xsd#embc_PenNeedlesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:to="loc_embc_PenNeedlesMember_f643b491-ff8b-4d18-8a3b-d40f5d24f962" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SyringesMember_a06b412f-3359-402d-8c8b-9177850dea1f" xlink:href="embc-20250331.xsd#embc_SyringesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:to="loc_embc_SyringesMember_a06b412f-3359-402d-8c8b-9177850dea1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SafetyMember_f38cf616-3533-4a31-8a1d-82537ff88ed1" xlink:href="embc-20250331.xsd#embc_SafetyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:to="loc_embc_SafetyMember_f38cf616-3533-4a31-8a1d-82537ff88ed1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_d75d9439-3be1-46b0-b972-87801e256ee2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_d75d9439-3be1-46b0-b972-87801e256ee2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManufacturingFacilityMember_e994e235-243e-4399-a789-917b7bb18f11" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ManufacturingFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_fb086ff0-db0f-4711-bdf4-2fd884d29881" xlink:to="loc_us-gaap_ManufacturingFacilityMember_e994e235-243e-4399-a789-917b7bb18f11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0ee35455-460d-42a3-a5e1-0dfd749a52f1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_640b3d4b-c19c-4350-aa16-8568f8e7b343" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0ee35455-460d-42a3-a5e1-0dfd749a52f1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/StockBasedCompensationStockbasedCompensationExpenseDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#StockBasedCompensationStockbasedCompensationExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/StockBasedCompensationStockbasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_1486d96b-9e72-48f5-a07b-f458124775c9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e519323f-358b-431a-98e8-f98b2be22212" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_1486d96b-9e72-48f5-a07b-f458124775c9" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e519323f-358b-431a-98e8-f98b2be22212" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e519323f-358b-431a-98e8-f98b2be22212" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e0778c8e-b632-448f-8ec4-f4b6ff1d4b47" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_a85797a2-1329-4dd3-a60f-63872875bbc1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:to="loc_us-gaap_CostOfSalesMember_a85797a2-1329-4dd3-a60f-63872875bbc1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_a658ebe0-dc5c-44e6-8bb0-e809cfa6697d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_a658ebe0-dc5c-44e6-8bb0-e809cfa6697d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c0e25563-e8c1-442d-b22d-9293d0696ac9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c0e25563-e8c1-442d-b22d-9293d0696ac9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncomeExpenseMember_73ad039e-ce85-4407-b74c-984057106cea" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_OtherOperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_98febab2-41ae-4055-8d86-e859a0452c41" xlink:to="loc_us-gaap_OtherOperatingIncomeExpenseMember_73ad039e-ce85-4407-b74c-984057106cea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_b37f1e4c-f63a-49a2-b0a4-62582eef5948" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_e519323f-358b-431a-98e8-f98b2be22212" xlink:to="loc_us-gaap_AwardTypeAxis_b37f1e4c-f63a-49a2-b0a4-62582eef5948" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b37f1e4c-f63a-49a2-b0a4-62582eef5948_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_b37f1e4c-f63a-49a2-b0a4-62582eef5948" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b37f1e4c-f63a-49a2-b0a4-62582eef5948_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_b37f1e4c-f63a-49a2-b0a4-62582eef5948" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockCompensationPlanMember_5da78127-31a2-46c8-b185-d3dac3caa22e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:to="loc_us-gaap_StockCompensationPlanMember_5da78127-31a2-46c8-b185-d3dac3caa22e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedPaymentArrangementLiabilityAwardMember_c7c10a27-6d2e-430b-9414-43d2abc74d36" xlink:href="embc-20250331.xsd#embc_ShareBasedPaymentArrangementLiabilityAwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:to="loc_embc_ShareBasedPaymentArrangementLiabilityAwardMember_c7c10a27-6d2e-430b-9414-43d2abc74d36" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_TimeVestedRestrictedStockUnitsMember_d34502b3-0e97-4d9d-babf-62b249f2c41d" xlink:href="embc-20250331.xsd#embc_TimeVestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:to="loc_embc_TimeVestedRestrictedStockUnitsMember_d34502b3-0e97-4d9d-babf-62b249f2c41d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_PerformanceBasedRestrictedStockUnitsMember_d346bd8c-1816-431a-ad18-9f25ae96d647" xlink:href="embc-20250331.xsd#embc_PerformanceBasedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:to="loc_embc_PerformanceBasedRestrictedStockUnitsMember_d346bd8c-1816-431a-ad18-9f25ae96d647" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_b9747188-eaf6-4865-a998-bd80f3f3303d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f2cf1888-9c11-4c51-9e5f-a503b16b8bc6" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_b9747188-eaf6-4865-a998-bd80f3f3303d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_e6bea2fa-d72b-413c-9233-bf37e28343fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_1486d96b-9e72-48f5-a07b-f458124775c9" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_e6bea2fa-d72b-413c-9233-bf37e28343fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_66c8ec1a-8691-4750-b073-9a80038b4027" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_1486d96b-9e72-48f5-a07b-f458124775c9" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_66c8ec1a-8691-4750-b073-9a80038b4027" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#StockBasedCompensationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/StockBasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_8c514d57-37eb-4d49-824b-b46aaf4fc5a5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_8c514d57-37eb-4d49-824b-b46aaf4fc5a5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f8f67824-1399-4ab4-aebb-340d3f995316" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_8c514d57-37eb-4d49-824b-b46aaf4fc5a5" xlink:to="loc_us-gaap_AwardTypeAxis_f8f67824-1399-4ab4-aebb-340d3f995316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f8f67824-1399-4ab4-aebb-340d3f995316_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_f8f67824-1399-4ab4-aebb-340d3f995316" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f8f67824-1399-4ab4-aebb-340d3f995316_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e413deed-2d18-430b-80fe-aa72473f150d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_f8f67824-1399-4ab4-aebb-340d3f995316" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e413deed-2d18-430b-80fe-aa72473f150d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_TimeVestedRestrictedStockUnitsMember_b2c93b70-ff9d-4e00-905e-1d078cb5a175" xlink:href="embc-20250331.xsd#embc_TimeVestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e413deed-2d18-430b-80fe-aa72473f150d" xlink:to="loc_embc_TimeVestedRestrictedStockUnitsMember_b2c93b70-ff9d-4e00-905e-1d078cb5a175" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_PerformanceStockUnitsPSUsMember_ce49c672-d5e2-46e7-aa03-5448b92aac4c" xlink:href="embc-20250331.xsd#embc_PerformanceStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e413deed-2d18-430b-80fe-aa72473f150d" xlink:to="loc_embc_PerformanceStockUnitsPSUsMember_ce49c672-d5e2-46e7-aa03-5448b92aac4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_fde76365-6777-43ca-a4d1-2beb14e3d455" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_e413deed-2d18-430b-80fe-aa72473f150d" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_fde76365-6777-43ca-a4d1-2beb14e3d455" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_ec3def9f-911a-4682-b2a0-e36c0a399e60" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_8c514d57-37eb-4d49-824b-b46aaf4fc5a5" xlink:to="loc_srt_TitleOfIndividualAxis_ec3def9f-911a-4682-b2a0-e36c0a399e60" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_ec3def9f-911a-4682-b2a0-e36c0a399e60_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_ec3def9f-911a-4682-b2a0-e36c0a399e60" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_ec3def9f-911a-4682-b2a0-e36c0a399e60_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_55ecc0b0-c83c-4dd1-8e5f-6dd494cdb32a" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_ec3def9f-911a-4682-b2a0-e36c0a399e60" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_55ecc0b0-c83c-4dd1-8e5f-6dd494cdb32a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ExecutiveOfficersAndEmployeesMember_8956efe9-5756-4cdf-bfec-84b623b19f3f" xlink:href="embc-20250331.xsd#embc_ExecutiveOfficersAndEmployeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_55ecc0b0-c83c-4dd1-8e5f-6dd494cdb32a" xlink:to="loc_embc_ExecutiveOfficersAndEmployeesMember_8956efe9-5756-4cdf-bfec-84b623b19f3f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_177b55d6-acc6-4f42-8324-f1c168501b48" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_8c514d57-37eb-4d49-824b-b46aaf4fc5a5" xlink:to="loc_us-gaap_PlanNameAxis_177b55d6-acc6-4f42-8324-f1c168501b48" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_177b55d6-acc6-4f42-8324-f1c168501b48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_177b55d6-acc6-4f42-8324-f1c168501b48" xlink:to="loc_us-gaap_PlanNameDomain_177b55d6-acc6-4f42-8324-f1c168501b48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_98cbe61f-70e1-413f-b0bc-1d8d035109e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_177b55d6-acc6-4f42-8324-f1c168501b48" xlink:to="loc_us-gaap_PlanNameDomain_98cbe61f-70e1-413f-b0bc-1d8d035109e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A2022EmployeeAndDirectorEquityBasedCompensationPlanMember_952ef969-9d19-4200-9f28-28014410b046" xlink:href="embc-20250331.xsd#embc_A2022EmployeeAndDirectorEquityBasedCompensationPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_98cbe61f-70e1-413f-b0bc-1d8d035109e3" xlink:to="loc_embc_A2022EmployeeAndDirectorEquityBasedCompensationPlanMember_952ef969-9d19-4200-9f28-28014410b046" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_43f6ad82-3165-4aff-8104-4bbfab40e4a3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_43f6ad82-3165-4aff-8104-4bbfab40e4a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_65a30ce0-67c4-44f7-9d29-b7e5c9c39332" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_65a30ce0-67c4-44f7-9d29-b7e5c9c39332" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4c0668c1-d31c-4a9d-bc91-121d2f60a412" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_4c0668c1-d31c-4a9d-bc91-121d2f60a412" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_59ccb38a-d787-49da-ada6-fdd456ea7c4c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_59ccb38a-d787-49da-ada6-fdd456ea7c4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_a19ec83e-6863-471b-9f84-63f8c16f41a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_a19ec83e-6863-471b-9f84-63f8c16f41a1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodExcludingAccumulatedNonvestedDividendEquivalents_d1a44b57-342b-4246-a47d-50f682635c91" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodExcludingAccumulatedNonvestedDividendEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodExcludingAccumulatedNonvestedDividendEquivalents_d1a44b57-342b-4246-a47d-50f682635c91" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_5665fd07-39e5-4d29-a38a-61b1ae6ee6d0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_5665fd07-39e5-4d29-a38a-61b1ae6ee6d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_3e42847c-f9a7-4d10-8da8-dd1a396feb43" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_3e42847c-f9a7-4d10-8da8-dd1a396feb43" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_8dcf9a4c-a34b-4a20-8686-2a585013fdb3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_341a73c6-e75f-4a57-93a4-99935a9775cd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_8dcf9a4c-a34b-4a20-8686-2a585013fdb3" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#StockBasedCompensationRestrictedStockUnitsActivityDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/StockBasedCompensationRestrictedStockUnitsActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3cb763fd-ab42-4626-9fec-cd0efe1c2f91" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3cb763fd-ab42-4626-9fec-cd0efe1c2f91" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_c8807034-d159-47d8-82d4-8d85f9618a3f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_3cb763fd-ab42-4626-9fec-cd0efe1c2f91" xlink:to="loc_us-gaap_AwardTypeAxis_c8807034-d159-47d8-82d4-8d85f9618a3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c8807034-d159-47d8-82d4-8d85f9618a3f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_c8807034-d159-47d8-82d4-8d85f9618a3f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_c8807034-d159-47d8-82d4-8d85f9618a3f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52e2d9bd-a9e8-4a98-b578-522ef5fc7da9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_c8807034-d159-47d8-82d4-8d85f9618a3f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52e2d9bd-a9e8-4a98-b578-522ef5fc7da9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_TimeVestedRestrictedStockUnitsMember_69f86e02-a243-47bf-9597-f99e62dd2657" xlink:href="embc-20250331.xsd#embc_TimeVestedRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52e2d9bd-a9e8-4a98-b578-522ef5fc7da9" xlink:to="loc_embc_TimeVestedRestrictedStockUnitsMember_69f86e02-a243-47bf-9597-f99e62dd2657" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_PerformanceStockUnitsPSUsMember_e873358e-2b2e-4e6b-9f08-829df6acf55d" xlink:href="embc-20250331.xsd#embc_PerformanceStockUnitsPSUsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_52e2d9bd-a9e8-4a98-b578-522ef5fc7da9" xlink:to="loc_embc_PerformanceStockUnitsPSUsMember_e873358e-2b2e-4e6b-9f08-829df6acf55d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_39030b3a-70ef-4984-9c4b-a623ef0a5770" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_39030b3a-70ef-4984-9c4b-a623ef0a5770" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_86346aac-9199-4007-ae37-5df96a551556" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_86346aac-9199-4007-ae37-5df96a551556" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_9801251b-7199-4cde-aea2-4ee44fb7813e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_9801251b-7199-4cde-aea2-4ee44fb7813e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_80a179ac-ba2f-4ceb-b913-62fc2957c440" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_89cf691b-b840-4178-a656-7d3fb40de031" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_80a179ac-ba2f-4ceb-b913-62fc2957c440" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0edd0e33-6f32-4221-b5f7-1dcaef911d60" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber_f4573ab5-0aa8-4f22-8435-09cfa3b220d1" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestOutstandingNumber_f4573ab5-0aa8-4f22-8435-09cfa3b220d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_424c9395-ec2c-4bf1-bf3f-2bb0b94a4e34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_424c9395-ec2c-4bf1-bf3f-2bb0b94a4e34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c0ad1e2c-5c8c-4a28-a95c-03fd16f56801" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c0ad1e2c-5c8c-4a28-a95c-03fd16f56801" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_17ae1489-14ac-4622-a924-145c5e3d9761" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_17ae1489-14ac-4622-a924-145c5e3d9761" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45b36542-601e-4f8f-8122-f349d6ada489" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_2425b79e-f420-460f-92bc-7aead52416d2" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_45b36542-601e-4f8f-8122-f349d6ada489" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_f37247ca-cf33-4a97-ae71-6b05cd83eb3e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue_3dbc934f-2e1b-4179-8b98-9429b4d77734" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_fe8e78e2-1a18-4599-ad44-d60207476b4b" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExpectedToVestWeightedAverageGrantDateFairValue_3dbc934f-2e1b-4179-8b98-9429b4d77734" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/StockBasedCompensationSARsOutstandingandtheChangesDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#StockBasedCompensationSARsOutstandingandtheChangesDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/StockBasedCompensationSARsOutstandingandtheChangesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_67f81fc5-89c2-4b00-ad5f-03c6880751e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_67f81fc5-89c2-4b00-ad5f-03c6880751e3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_50b46972-e8cc-4c4e-8e10-3770ccc82a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_67f81fc5-89c2-4b00-ad5f-03c6880751e3" xlink:to="loc_us-gaap_AwardTypeAxis_50b46972-e8cc-4c4e-8e10-3770ccc82a0b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_50b46972-e8cc-4c4e-8e10-3770ccc82a0b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_50b46972-e8cc-4c4e-8e10-3770ccc82a0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_50b46972-e8cc-4c4e-8e10-3770ccc82a0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f486f9f-de83-4510-9b17-8210d1cd10de" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_50b46972-e8cc-4c4e-8e10-3770ccc82a0b" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f486f9f-de83-4510-9b17-8210d1cd10de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_5b73b926-9d1f-4fae-9b2a-d3d6c40e7c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StockAppreciationRightsSARSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7f486f9f-de83-4510-9b17-8210d1cd10de" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_5b73b926-9d1f-4fae-9b2a-d3d6c40e7c8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_566c2ebb-701d-41a9-8274-3ba64f4e99a1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_566c2ebb-701d-41a9-8274-3ba64f4e99a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_bd549d78-d171-4b4e-8fed-7a57b247841b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_566c2ebb-701d-41a9-8274-3ba64f4e99a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_bd549d78-d171-4b4e-8fed-7a57b247841b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_a76dc951-a734-4ef6-a6b6-80fcc0d9fb8e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_566c2ebb-701d-41a9-8274-3ba64f4e99a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_a76dc951-a734-4ef6-a6b6-80fcc0d9fb8e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_00bb7d75-a255-4efb-a158-c7ed469579e3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_566c2ebb-701d-41a9-8274-3ba64f4e99a1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirations_00bb7d75-a255-4efb-a158-c7ed469579e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_a30259b9-7e63-4355-9e10-cdd5b137b285" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingNumber_893db50b-55b6-4182-8f69-f13921101d81" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingNumber_893db50b-55b6-4182-8f69-f13921101d81" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber_65c960ff-b1d9-45b8-bc40-5afce983d39f" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableNumber_65c960ff-b1d9-45b8-bc40-5afce983d39f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward_51b5340a-da24-43c4-95f6-9e44db3817e3" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward_51b5340a-da24-43c4-95f6-9e44db3817e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice_a4a8ab17-695a-4ad8-9a85-2e706f1c513d" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward_51b5340a-da24-43c4-95f6-9e44db3817e3" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice_a4a8ab17-695a-4ad8-9a85-2e706f1c513d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice_0bc91423-35f7-4a9c-8b05-d396053ca804" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward_51b5340a-da24-43c4-95f6-9e44db3817e3" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisesInPeriodWeightedAverageExercisePrice_0bc91423-35f7-4a9c-8b05-d396053ca804" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_213e73ae-a05e-440b-afef-6dea44b93f96" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsWeightedAverageExercisePriceRollForward_51b5340a-da24-43c4-95f6-9e44db3817e3" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_213e73ae-a05e-440b-afef-6dea44b93f96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice_34bedd2b-b84b-44b6-8877-f9138b0562b0" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_539732a3-1cdd-4a10-b13d-5a361014015e" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_539732a3-1cdd-4a10-b13d-5a361014015e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice_3833a8db-4cb0-4158-bb0c-743f5ce369fd" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageExercisePrice_3833a8db-4cb0-4158-bb0c-743f5ce369fd" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_8ece22d2-61b2-4595-a3f1-ca196460d9a6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_e6b182e1-9889-401d-a1c4-ac1818e458ab" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingWeightedAverageRemainingContractualTerms_e6b182e1-9889-401d-a1c4-ac1818e458ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm_c814d6b8-de7d-4231-b931-6843cd1aee6e" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm_c814d6b8-de7d-4231-b931-6843cd1aee6e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageRemainingContractualTerm_e9f4ef39-83c8-409f-97f3-46ac37220bbc" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageRemainingContractualTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableWeightedAverageRemainingContractualTerm_e9f4ef39-83c8-409f-97f3-46ac37220bbc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_4cae811e-a9f2-480d-8651-8d9868eb344b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_4cae811e-a9f2-480d-8651-8d9868eb344b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_251134c5-2d19-4704-8a85-c255e41630b7" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_251134c5-2d19-4704-8a85-c255e41630b7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableAggregateIntrinsicValue_f9e2d69f-8680-4333-82fd-3b53c2af02a4" xlink:href="embc-20250331.xsd#embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableAggregateIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsAdditionalDisclosuresAbstract_0c48dcac-a3ac-4346-aff5-ccd38b4849fd" xlink:to="loc_embc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercisableAggregateIntrinsicValue_f9e2d69f-8680-4333-82fd-3b53c2af02a4" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillandOtherIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9603b05d-faff-4751-bab3-1da279a31c02" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_edf06bae-0e58-4398-85bd-56d6dc2cb9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9603b05d-faff-4751-bab3-1da279a31c02" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_edf06bae-0e58-4398-85bd-56d6dc2cb9f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df9b2744-66ca-469b-8477-7a6d8fa1fc12" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_edf06bae-0e58-4398-85bd-56d6dc2cb9f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df9b2744-66ca-469b-8477-7a6d8fa1fc12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_df9b2744-66ca-469b-8477-7a6d8fa1fc12_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df9b2744-66ca-469b-8477-7a6d8fa1fc12" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_df9b2744-66ca-469b-8477-7a6d8fa1fc12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_579d9352-3e71-4b8f-8991-cb0d5129909c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df9b2744-66ca-469b-8477-7a6d8fa1fc12" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_579d9352-3e71-4b8f-8991-cb0d5129909c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PatentsMember_e61403d0-ed37-4f88-92dc-11aacf5c32da" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PatentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_579d9352-3e71-4b8f-8991-cb0d5129909c" xlink:to="loc_us-gaap_PatentsMember_e61403d0-ed37-4f88-92dc-11aacf5c32da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_CustomerRelationshipAndOtherMember_73b06ba7-ee15-4143-965c-aea02ad6c629" xlink:href="embc-20250331.xsd#embc_CustomerRelationshipAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_579d9352-3e71-4b8f-8991-cb0d5129909c" xlink:to="loc_embc_CustomerRelationshipAndOtherMember_73b06ba7-ee15-4143-965c-aea02ad6c629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_62c836fe-185d-4481-a5c9-f709f474a56c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9603b05d-faff-4751-bab3-1da279a31c02" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_62c836fe-185d-4481-a5c9-f709f474a56c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_dbc16cfc-977a-413b-9f11-ca2cfec55ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9603b05d-faff-4751-bab3-1da279a31c02" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_dbc16cfc-977a-413b-9f11-ca2cfec55ca1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0245039a-e038-4f5f-beff-f8bee172083d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_9603b05d-faff-4751-bab3-1da279a31c02" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_0245039a-e038-4f5f-beff-f8bee172083d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/CloudComputingArrangementsAdditionalInformationDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#CloudComputingArrangementsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/CloudComputingArrangementsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_bf6bf6fc-7861-40af-a643-7682f0677a58" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_9e2ae4d1-c6c2-42b4-81a2-9d518c8bf57b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_bf6bf6fc-7861-40af-a643-7682f0677a58" xlink:to="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_9e2ae4d1-c6c2-42b4-81a2-9d518c8bf57b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d7bc3a12-0f4b-47a9-b842-d5003d966736" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfCollaborativeArrangementsAndNoncollaborativeArrangementTransactionsTable_9e2ae4d1-c6c2-42b4-81a2-9d518c8bf57b" xlink:to="loc_srt_RangeAxis_d7bc3a12-0f4b-47a9-b842-d5003d966736" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d7bc3a12-0f4b-47a9-b842-d5003d966736_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d7bc3a12-0f4b-47a9-b842-d5003d966736" xlink:to="loc_srt_RangeMember_d7bc3a12-0f4b-47a9-b842-d5003d966736_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d7236c96-05b2-481e-b777-c2ab457dfe6f" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d7bc3a12-0f4b-47a9-b842-d5003d966736" xlink:to="loc_srt_RangeMember_d7236c96-05b2-481e-b777-c2ab457dfe6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_cc9ccc87-9d21-4f27-b9ea-457885948847" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d7236c96-05b2-481e-b777-c2ab457dfe6f" xlink:to="loc_srt_MinimumMember_cc9ccc87-9d21-4f27-b9ea-457885948847" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_91977be0-08f4-4214-8bb1-30c903daf5a2" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d7236c96-05b2-481e-b777-c2ab457dfe6f" xlink:to="loc_srt_MaximumMember_91977be0-08f4-4214-8bb1-30c903daf5a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_HostingArrangementServiceContractAssetsInServiceUsefulLife_e04312c7-9e5d-4fd2-b808-d3beea2528f3" xlink:href="embc-20250331.xsd#embc_HostingArrangementServiceContractAssetsInServiceUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems_bf6bf6fc-7861-40af-a643-7682f0677a58" xlink:to="loc_embc_HostingArrangementServiceContractAssetsInServiceUsefulLife_e04312c7-9e5d-4fd2-b808-d3beea2528f3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#LongTermDebtAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/LongTermDebtAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_3f8def16-75f2-4338-a32c-6be3a0927703" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:to="loc_us-gaap_DebtInstrumentAxis_3f8def16-75f2-4338-a32c-6be3a0927703" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_3f8def16-75f2-4338-a32c-6be3a0927703_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_3f8def16-75f2-4338-a32c-6be3a0927703" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_3f8def16-75f2-4338-a32c-6be3a0927703_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_3f8def16-75f2-4338-a32c-6be3a0927703" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SeniorSecuredTermLoanBMaturingMarch2029Member_e7e43d03-3ee2-4a4b-adbb-6f9fe02a9027" xlink:href="embc-20250331.xsd#embc_SeniorSecuredTermLoanBMaturingMarch2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:to="loc_embc_SeniorSecuredTermLoanBMaturingMarch2029Member_e7e43d03-3ee2-4a4b-adbb-6f9fe02a9027" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SeniorSecuredRevolvingCreditFacilityMaturing2027Member_f90da224-8ec9-488e-b37d-b50aa0a4a16f" xlink:href="embc-20250331.xsd#embc_SeniorSecuredRevolvingCreditFacilityMaturing2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:to="loc_embc_SeniorSecuredRevolvingCreditFacilityMaturing2027Member_f90da224-8ec9-488e-b37d-b50aa0a4a16f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A500SeniorSecuredNotesDueFebruary2030Member_ec002993-44e6-48ab-a66f-38fe3dd5961c" xlink:href="embc-20250331.xsd#embc_A500SeniorSecuredNotesDueFebruary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:to="loc_embc_A500SeniorSecuredNotesDueFebruary2030Member_ec002993-44e6-48ab-a66f-38fe3dd5961c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A675SeniorSecuredNotesDueFebruary2030Member_6dcf6e8f-0c32-40dc-834f-bfb98fb09b64" xlink:href="embc-20250331.xsd#embc_A675SeniorSecuredNotesDueFebruary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_14673c87-fa24-451e-be56-e193efecd1f5" xlink:to="loc_embc_A675SeniorSecuredNotesDueFebruary2030Member_6dcf6e8f-0c32-40dc-834f-bfb98fb09b64" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_91188fed-17ce-467f-8f35-22db9c025e73" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_91188fed-17ce-467f-8f35-22db9c025e73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_91188fed-17ce-467f-8f35-22db9c025e73_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91188fed-17ce-467f-8f35-22db9c025e73" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_91188fed-17ce-467f-8f35-22db9c025e73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_9895f3a8-e728-4e2f-90fd-79d54eda7b80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91188fed-17ce-467f-8f35-22db9c025e73" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_9895f3a8-e728-4e2f-90fd-79d54eda7b80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_9f886e05-45e8-42b1-98ce-b4e60878e5c4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_9895f3a8-e728-4e2f-90fd-79d54eda7b80" xlink:to="loc_us-gaap_SecuredDebtMember_9f886e05-45e8-42b1-98ce-b4e60878e5c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_3c71f0e7-2b5c-4696-a7a5-730a67490200" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_9895f3a8-e728-4e2f-90fd-79d54eda7b80" xlink:to="loc_us-gaap_SeniorNotesMember_3c71f0e7-2b5c-4696-a7a5-730a67490200" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:to="loc_us-gaap_CreditFacilityAxis_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af" xlink:to="loc_us-gaap_CreditFacilityDomain_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_df05fd66-118c-44a6-bcc4-503981fefa09" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_4a0b6490-f7f2-44f8-a51f-a64aa71cb6af" xlink:to="loc_us-gaap_CreditFacilityDomain_df05fd66-118c-44a6-bcc4-503981fefa09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_fc6e1322-0dbe-471f-9fd7-8fa54329ed6e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_df05fd66-118c-44a6-bcc4-503981fefa09" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_fc6e1322-0dbe-471f-9fd7-8fa54329ed6e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_69ffc785-7e08-436a-954b-db7460c85bf9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_69ffc785-7e08-436a-954b-db7460c85bf9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_69ffc785-7e08-436a-954b-db7460c85bf9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_69ffc785-7e08-436a-954b-db7460c85bf9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_69ffc785-7e08-436a-954b-db7460c85bf9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ec93b8cf-4b82-4eb8-b5fd-a6a2246e29d8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_69ffc785-7e08-436a-954b-db7460c85bf9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ec93b8cf-4b82-4eb8-b5fd-a6a2246e29d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_6c951c2a-c72a-4794-950a-6c85511618ad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ec93b8cf-4b82-4eb8-b5fd-a6a2246e29d8" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_6c951c2a-c72a-4794-950a-6c85511618ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_0461cfc4-2a3e-4034-9ff1-6ebed45d594e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8feae4dd-e162-4b7a-90fc-6fb1bf39b31a" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_0461cfc4-2a3e-4034-9ff1-6ebed45d594e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0461cfc4-2a3e-4034-9ff1-6ebed45d594e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_0461cfc4-2a3e-4034-9ff1-6ebed45d594e" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_0461cfc4-2a3e-4034-9ff1-6ebed45d594e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_150c303d-be27-4686-9c62-deda6c161fe0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_0461cfc4-2a3e-4034-9ff1-6ebed45d594e" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_150c303d-be27-4686-9c62-deda6c161fe0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_54395e0c-d7d6-4516-9242-c8989dfc4194" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_150c303d-be27-4686-9c62-deda6c161fe0" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_54395e0c-d7d6-4516-9242-c8989dfc4194" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_998b0de9-efff-4c48-8601-377e9a9683cf" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_54395e0c-d7d6-4516-9242-c8989dfc4194" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_998b0de9-efff-4c48-8601-377e9a9683cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ab16671e-075e-489c-95ed-e42028a96892" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_54395e0c-d7d6-4516-9242-c8989dfc4194" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_ab16671e-075e-489c-95ed-e42028a96892" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_031489dc-92db-4841-b248-0ea880470a34" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_031489dc-92db-4841-b248-0ea880470a34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTerm_13890faa-3613-4c64-8ee1-32f1181322c5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtInstrumentTerm_13890faa-3613-4c64-8ee1-32f1181322c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_c5a90297-b9e6-40b8-898b-f57626f3e8f9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_c5a90297-b9e6-40b8-898b-f57626f3e8f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_DebtInstrumentVariableRateFloor_447c38b3-77d6-46a4-a2af-02ed1df88f22" xlink:href="embc-20250331.xsd#embc_DebtInstrumentVariableRateFloor"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_embc_DebtInstrumentVariableRateFloor_447c38b3-77d6-46a4-a2af-02ed1df88f22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_DebtInstrumentDiscountPercentage_bc998ffe-3681-43a9-b4dc-2e1be93bc436" xlink:href="embc-20250331.xsd#embc_DebtInstrumentDiscountPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_embc_DebtInstrumentDiscountPercentage_bc998ffe-3681-43a9-b4dc-2e1be93bc436" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_DebtInstrumentPeriodicPaymentPrincipalPercentage_b5f6a9e2-6f86-48cc-877c-5b3e6bb5b4f2" xlink:href="embc-20250331.xsd#embc_DebtInstrumentPeriodicPaymentPrincipalPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_embc_DebtInstrumentPeriodicPaymentPrincipalPercentage_b5f6a9e2-6f86-48cc-877c-5b3e6bb5b4f2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_de309014-3478-499a-a4d7-af5495f5e42c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_de309014-3478-499a-a4d7-af5495f5e42c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_c2ce6c91-5314-400e-9286-13d5ff7c2756" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCreditFacilityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_c2ce6c91-5314-400e-9286-13d5ff7c2756" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_df24361c-3b4f-47d6-901f-1b2759bd3d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_LineOfCredit_df24361c-3b4f-47d6-901f-1b2759bd3d7e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_cc4684cc-ed51-40c6-866c-f39d15e71756" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_cc4684cc-ed51-40c6-866c-f39d15e71756" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_d4e2e994-3fd3-40b7-86a2-6e430e74615f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_d4e2e994-3fd3-40b7-86a2-6e430e74615f" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_f368296c-75f8-45c5-ab29-dff768d8f0ca" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_InterestPaidNet_f368296c-75f8-45c5-ab29-dff768d8f0ca" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_1a236d2a-fe7f-41f6-a463-1b4f106e2c0e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_1a236d2a-fe7f-41f6-a463-1b4f106e2c0e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfSecuredDebt_1a8a033a-aaf2-476e-a27b-ff8953d8048e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RepaymentsOfSecuredDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_RepaymentsOfSecuredDebt_1a8a033a-aaf2-476e-a27b-ff8953d8048e" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount_9474725f-98d9-4b42-8fd9-c34c27a8545d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAmount_9474725f-98d9-4b42-8fd9-c34c27a8545d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_2163bb1f-cd59-4388-8a30-69db8fbf3047" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5d2be376-1e42-4596-838f-420be9f5bbb5" xlink:to="loc_us-gaap_LongTermDebtFairValue_2163bb1f-cd59-4388-8a30-69db8fbf3047" xlink:type="arc" order="15"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/LongTermDebtDebtOutstandingDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#LongTermDebtDebtOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/LongTermDebtDebtOutstandingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_6a0970b5-32ae-4485-b3eb-b7a3a1c32a4b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_DebtInstrumentTable_6a0970b5-32ae-4485-b3eb-b7a3a1c32a4b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_fa8907cd-9bee-42c5-9c93-9526508401ee" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a0970b5-32ae-4485-b3eb-b7a3a1c32a4b" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_fa8907cd-9bee-42c5-9c93-9526508401ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_fa8907cd-9bee-42c5-9c93-9526508401ee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_fa8907cd-9bee-42c5-9c93-9526508401ee" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_fa8907cd-9bee-42c5-9c93-9526508401ee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ab9055b8-6723-459c-a4eb-59907aee761f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_fa8907cd-9bee-42c5-9c93-9526508401ee" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_ab9055b8-6723-459c-a4eb-59907aee761f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_a98a3c61-a26a-4fdc-a3c6-c11c01776cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ab9055b8-6723-459c-a4eb-59907aee761f" xlink:to="loc_us-gaap_SecuredDebtMember_a98a3c61-a26a-4fdc-a3c6-c11c01776cb4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ce20bb5d-cb92-4827-af31-8d2dfb285e2f" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ab9055b8-6723-459c-a4eb-59907aee761f" xlink:to="loc_us-gaap_SeniorNotesMember_ce20bb5d-cb92-4827-af31-8d2dfb285e2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_43268b11-eacb-4bf4-bb76-a577b0081d22" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6a0970b5-32ae-4485-b3eb-b7a3a1c32a4b" xlink:to="loc_us-gaap_DebtInstrumentAxis_43268b11-eacb-4bf4-bb76-a577b0081d22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_43268b11-eacb-4bf4-bb76-a577b0081d22_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_43268b11-eacb-4bf4-bb76-a577b0081d22" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_43268b11-eacb-4bf4-bb76-a577b0081d22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_bf26b60d-1089-4b11-9859-976d91c9130a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_43268b11-eacb-4bf4-bb76-a577b0081d22" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_bf26b60d-1089-4b11-9859-976d91c9130a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_SeniorSecuredTermLoanBMaturingMarch2029Member_e2f2722c-71e5-4aed-bfda-be0b0918da16" xlink:href="embc-20250331.xsd#embc_SeniorSecuredTermLoanBMaturingMarch2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bf26b60d-1089-4b11-9859-976d91c9130a" xlink:to="loc_embc_SeniorSecuredTermLoanBMaturingMarch2029Member_e2f2722c-71e5-4aed-bfda-be0b0918da16" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A500SeniorSecuredNotesDueFebruary2030Member_009a85af-682d-4373-9eda-0a0155e4a3cc" xlink:href="embc-20250331.xsd#embc_A500SeniorSecuredNotesDueFebruary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bf26b60d-1089-4b11-9859-976d91c9130a" xlink:to="loc_embc_A500SeniorSecuredNotesDueFebruary2030Member_009a85af-682d-4373-9eda-0a0155e4a3cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_A675SeniorSecuredNotesDueFebruary2030Member_a1f99328-9b21-49d3-8341-a739a5f3fa22" xlink:href="embc-20250331.xsd#embc_A675SeniorSecuredNotesDueFebruary2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_bf26b60d-1089-4b11-9859-976d91c9130a" xlink:to="loc_embc_A675SeniorSecuredNotesDueFebruary2030Member_a1f99328-9b21-49d3-8341-a739a5f3fa22" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1c2d137d-da22-4145-b85b-91c89c458c41" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1c2d137d-da22-4145-b85b-91c89c458c41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_3333fedf-cb81-41fe-889a-b4b49844c442" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_3333fedf-cb81-41fe-889a-b4b49844c442" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_02b682fe-4810-4e8a-93da-c4e52d4dbed8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_LongTermDebtCurrent_02b682fe-4810-4e8a-93da-c4e52d4dbed8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_edf5fc2d-cb38-4229-a39e-43711362e9ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_edf5fc2d-cb38-4229-a39e-43711362e9ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent_1b2016a6-ff69-4454-a75a-d812b336e4bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_fa6da59e-b1a1-4ac7-87f4-abd23133f42a" xlink:to="loc_us-gaap_LongTermDebtNoncurrent_1b2016a6-ff69-4454-a75a-d812b336e4bc" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/FinancialInstrumentsandFairValueMeasurementsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_8262f13b-770c-4353-81c0-aa813dc3759e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_8262f13b-770c-4353-81c0-aa813dc3759e" xlink:to="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_c45f46dd-eb69-4ec6-873b-46fc9968bf5b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_c45f46dd-eb69-4ec6-873b-46fc9968bf5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_c45f46dd-eb69-4ec6-873b-46fc9968bf5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c45f46dd-eb69-4ec6-873b-46fc9968bf5b" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_c45f46dd-eb69-4ec6-873b-46fc9968bf5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_bed6e9f1-ee76-4b2b-bce1-69d7b9218be3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c45f46dd-eb69-4ec6-873b-46fc9968bf5b" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_bed6e9f1-ee76-4b2b-bce1-69d7b9218be3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerConcentrationRiskMember_452182c6-2ec4-4320-a759-f517b9cea8ae" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CustomerConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_bed6e9f1-ee76-4b2b-bce1-69d7b9218be3" xlink:to="loc_us-gaap_CustomerConcentrationRiskMember_452182c6-2ec4-4320-a759-f517b9cea8ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_239dce9b-4f68-4091-a76e-21c9ff6adc2c" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_239dce9b-4f68-4091-a76e-21c9ff6adc2c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_239dce9b-4f68-4091-a76e-21c9ff6adc2c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_239dce9b-4f68-4091-a76e-21c9ff6adc2c" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_239dce9b-4f68-4091-a76e-21c9ff6adc2c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_93b254a2-3839-48e4-9d38-75a84321d5d3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_239dce9b-4f68-4091-a76e-21c9ff6adc2c" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_93b254a2-3839-48e4-9d38-75a84321d5d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerMember_44eb104c-82ff-4173-ae58-683dab97633d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_RevenueFromContractWithCustomerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_93b254a2-3839-48e4-9d38-75a84321d5d3" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerMember_44eb104c-82ff-4173-ae58-683dab97633d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableMember_5bcdccfc-ff85-47b5-a188-5f94261b7742" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccountsReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_93b254a2-3839-48e4-9d38-75a84321d5d3" xlink:to="loc_us-gaap_AccountsReceivableMember_5bcdccfc-ff85-47b5-a188-5f94261b7742" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MajorCustomersAxis_cb311d99-c1d0-4c1a-97bd-36987b0b1228" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_MajorCustomersAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:to="loc_srt_MajorCustomersAxis_cb311d99-c1d0-4c1a-97bd-36987b0b1228" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_cb311d99-c1d0-4c1a-97bd-36987b0b1228_default" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MajorCustomersAxis_cb311d99-c1d0-4c1a-97bd-36987b0b1228" xlink:to="loc_srt_NameOfMajorCustomerDomain_cb311d99-c1d0-4c1a-97bd-36987b0b1228_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_NameOfMajorCustomerDomain_0eb8837d-e541-4b7a-8db0-96bb9857218c" xlink:href="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd#srt_NameOfMajorCustomerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MajorCustomersAxis_cb311d99-c1d0-4c1a-97bd-36987b0b1228" xlink:to="loc_srt_NameOfMajorCustomerDomain_0eb8837d-e541-4b7a-8db0-96bb9857218c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_CustomerOneCustomerTwoAndCustomerThreeMember_ad5781ae-3117-4643-ac9f-7859e8186974" xlink:href="embc-20250331.xsd#embc_CustomerOneCustomerTwoAndCustomerThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0eb8837d-e541-4b7a-8db0-96bb9857218c" xlink:to="loc_embc_CustomerOneCustomerTwoAndCustomerThreeMember_ad5781ae-3117-4643-ac9f-7859e8186974" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_embc_CustomerOneAndCustomerTwoMember_c4c8200d-7f63-46b1-8f0a-40d831ec1263" xlink:href="embc-20250331.xsd#embc_CustomerOneAndCustomerTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_NameOfMajorCustomerDomain_0eb8837d-e541-4b7a-8db0-96bb9857218c" xlink:to="loc_embc_CustomerOneAndCustomerTwoMember_c4c8200d-7f63-46b1-8f0a-40d831ec1263" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_7133f8c8-2c74-4b86-9382-269b57c3a6d6" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_11360649-0a9d-4509-acee-2353fa9131be" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_d8af3e3f-0aee-4831-b457-62ceb4ad4f6d" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_11360649-0a9d-4509-acee-2353fa9131be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_59acba91-6d07-45ed-8663-29a48ace07e8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_11360649-0a9d-4509-acee-2353fa9131be" xlink:to="loc_us-gaap_CostOfSalesMember_59acba91-6d07-45ed-8663-29a48ace07e8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c944c9d1-fb4b-42c9-93f4-b50de7fe66ce" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_11360649-0a9d-4509-acee-2353fa9131be" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_c944c9d1-fb4b-42c9-93f4-b50de7fe66ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeOther_6be08087-18ea-4958-9c02-d600fa4718c2" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_InterestIncomeOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_8262f13b-770c-4353-81c0-aa813dc3759e" xlink:to="loc_us-gaap_InterestIncomeOther_6be08087-18ea-4958-9c02-d600fa4718c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_1ae39f41-92f6-4591-b9be-522a37dab707" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TangibleAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_8262f13b-770c-4353-81c0-aa813dc3759e" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_1ae39f41-92f6-4591-b9be-522a37dab707" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_d4d1cd69-807e-4238-ac24-34bb1494f9f3" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_8262f13b-770c-4353-81c0-aa813dc3759e" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_d4d1cd69-807e-4238-ac24-34bb1494f9f3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/FinancialInstrumentsandFairValueMeasurementsNotionalAmountsofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#FinancialInstrumentsandFairValueMeasurementsNotionalAmountsofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/FinancialInstrumentsandFairValueMeasurementsNotionalAmountsofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_4f3078a1-6f43-4abf-b5d1-45624cd9ca80" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_e0fdfe2a-ce8f-4e00-b387-e29ed6c92811" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_4f3078a1-6f43-4abf-b5d1-45624cd9ca80" xlink:to="loc_us-gaap_DerivativeTable_e0fdfe2a-ce8f-4e00-b387-e29ed6c92811" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_d28e9862-b9ab-4679-9962-8ad9130386cc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e0fdfe2a-ce8f-4e00-b387-e29ed6c92811" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_d28e9862-b9ab-4679-9962-8ad9130386cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d28e9862-b9ab-4679-9962-8ad9130386cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d28e9862-b9ab-4679-9962-8ad9130386cc" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d28e9862-b9ab-4679-9962-8ad9130386cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_987e48b7-e6de-4dbd-a2e5-5a0bb2266316" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d28e9862-b9ab-4679-9962-8ad9130386cc" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_987e48b7-e6de-4dbd-a2e5-5a0bb2266316" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeContractMember_012bb0b9-4e9c-4786-81d4-011d49cab5e0" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ForeignExchangeContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_987e48b7-e6de-4dbd-a2e5-5a0bb2266316" xlink:to="loc_us-gaap_ForeignExchangeContractMember_012bb0b9-4e9c-4786-81d4-011d49cab5e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_674ebd7f-ea91-4ff6-ba38-4c06870cd315" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_e0fdfe2a-ce8f-4e00-b387-e29ed6c92811" xlink:to="loc_us-gaap_HedgingDesignationAxis_674ebd7f-ea91-4ff6-ba38-4c06870cd315" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_674ebd7f-ea91-4ff6-ba38-4c06870cd315_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_674ebd7f-ea91-4ff6-ba38-4c06870cd315" xlink:to="loc_us-gaap_HedgingDesignationDomain_674ebd7f-ea91-4ff6-ba38-4c06870cd315_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_65303bdd-921a-43d6-b756-81c6dbcee4ba" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_674ebd7f-ea91-4ff6-ba38-4c06870cd315" xlink:to="loc_us-gaap_HedgingDesignationDomain_65303bdd-921a-43d6-b756-81c6dbcee4ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_f8f78f15-0359-4c01-b166-83fdb4e576a8" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_65303bdd-921a-43d6-b756-81c6dbcee4ba" xlink:to="loc_us-gaap_NondesignatedMember_f8f78f15-0359-4c01-b166-83fdb4e576a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_e1ac2463-d72e-4cda-a732-449699ea28bc" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_4f3078a1-6f43-4abf-b5d1-45624cd9ca80" xlink:to="loc_us-gaap_DerivativeNotionalAmount_e1ac2463-d72e-4cda-a732-449699ea28bc" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/PropertyPlantandEquipmentDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#PropertyPlantandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/PropertyPlantandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2075dd7b-2270-4e28-8c6e-1e1e8960d320" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c5361068-316c-49d4-9562-0f9a5e0b5feb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2075dd7b-2270-4e28-8c6e-1e1e8960d320" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c5361068-316c-49d4-9562-0f9a5e0b5feb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_345aa6b2-9c68-414c-9cb8-b9d788d53c5d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_c5361068-316c-49d4-9562-0f9a5e0b5feb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_345aa6b2-9c68-414c-9cb8-b9d788d53c5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_345aa6b2-9c68-414c-9cb8-b9d788d53c5d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_345aa6b2-9c68-414c-9cb8-b9d788d53c5d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_345aa6b2-9c68-414c-9cb8-b9d788d53c5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_345aa6b2-9c68-414c-9cb8-b9d788d53c5d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_773f72ed-077e-4fe7-976f-57abe0bacb47" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:to="loc_us-gaap_LandMember_773f72ed-077e-4fe7-976f-57abe0bacb47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_cf764c21-664a-4663-b74e-ce62572a5d04" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:to="loc_us-gaap_BuildingMember_cf764c21-664a-4663-b74e-ce62572a5d04" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MachineryAndEquipmentMember_5a3b88e5-8323-4817-82a7-a751c5673d9a" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_MachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:to="loc_us-gaap_MachineryAndEquipmentMember_5a3b88e5-8323-4817-82a7-a751c5673d9a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_3e1f33ef-300c-4bd0-941b-aefd3233730e" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_3e1f33ef-300c-4bd0-941b-aefd3233730e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_d1771bfe-9f21-452c-aeca-8dc8f189edad" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ConstructionInProgressMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_3deb66c7-a303-40e8-a36b-d985b41c3a6d" xlink:to="loc_us-gaap_ConstructionInProgressMember_d1771bfe-9f21-452c-aeca-8dc8f189edad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_8073e62d-8096-4597-b566-0ac904a98d98" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2075dd7b-2270-4e28-8c6e-1e1e8960d320" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_8073e62d-8096-4597-b566-0ac904a98d98" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_e66a2733-a43c-476b-b8ce-74cbd3470adb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2075dd7b-2270-4e28-8c6e-1e1e8960d320" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_e66a2733-a43c-476b-b8ce-74cbd3470adb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_6b1ad2d1-b71e-4098-9b91-d13f7b674ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_2075dd7b-2270-4e28-8c6e-1e1e8960d320" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_6b1ad2d1-b71e-4098-9b91-d13f7b674ebb" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.embecta.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" xlink:type="simple" xlink:href="embc-20250331.xsd#PropertyPlantandEquipmentAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.embecta.com/role/PropertyPlantandEquipmentAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_25e9e1a6-513c-432c-b12c-f4bac0ce0890" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e25fc933-000e-433d-aa1f-3b45f6b29086" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_25e9e1a6-513c-432c-b12c-f4bac0ce0890" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e25fc933-000e-433d-aa1f-3b45f6b29086" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_55469ceb-9654-4bb3-9639-2823f80f8d49" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_e25fc933-000e-433d-aa1f-3b45f6b29086" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_55469ceb-9654-4bb3-9639-2823f80f8d49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_55469ceb-9654-4bb3-9639-2823f80f8d49_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_55469ceb-9654-4bb3-9639-2823f80f8d49" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_55469ceb-9654-4bb3-9639-2823f80f8d49_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_d9b22d7c-b38f-47d3-b677-afc4847e0969" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_55469ceb-9654-4bb3-9639-2823f80f8d49" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_d9b22d7c-b38f-47d3-b677-afc4847e0969" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_aa0ef569-f961-4ee6-8337-462383a1e6b4" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_d9b22d7c-b38f-47d3-b677-afc4847e0969" xlink:to="loc_us-gaap_CostOfSalesMember_aa0ef569-f961-4ee6-8337-462383a1e6b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_3659b54e-7547-40f5-8276-78b3ab298d57" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ResearchAndDevelopmentExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_d9b22d7c-b38f-47d3-b677-afc4847e0969" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_3659b54e-7547-40f5-8276-78b3ab298d57" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_991685e4-955b-4c19-b493-703f25b16965" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_TangibleAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_25e9e1a6-513c-432c-b12c-f4bac0ce0890" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_991685e4-955b-4c19-b493-703f25b16965" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-roles-2024.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="101"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndOtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxesAndOtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndOtherAssetsNoncurrent" xlink:type="arc" order="102"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" order="41"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndOtherLiabilitiesNoncurrent" xlink:type="arc" order="91"/>
  </link:definitionLink>
</link:linkbase>
