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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019c6cca-0363-7f7d-83e0-84c8dc3f73dc,g:c2af6c75-da41-4657-ba3f-ef116d8af29a-->
<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.coty.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="simple" xlink:href="coty-20260331.xsd#CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_019c6cca-060a-70dc-969b-d0eabcba9b60" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_019c6cca-060a-7e51-8e4f-18f0c0304191" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_019c6cca-060a-70dc-969b-d0eabcba9b60" xlink:to="loc_us-gaap_StatementTable_019c6cca-060a-7e51-8e4f-18f0c0304191" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-060a-7668-853a-62ed94e3c998" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c6cca-060a-7e51-8e4f-18f0c0304191" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-060a-7668-853a-62ed94e3c998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7668-853a-62ed94e3c998_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-060a-7668-853a-62ed94e3c998" xlink:to="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7668-853a-62ed94e3c998_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7c00-afa1-d5b0f38618c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-060a-7668-853a-62ed94e3c998" xlink:to="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7c00-afa1-d5b0f38618c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7c00-afa1-d5b0f38618c4" xlink:to="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_019c6cca-060a-7031-ab6d-5d3acd1e1c51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_PreferredStockMember_019c6cca-060a-7031-ab6d-5d3acd1e1c51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019c6cca-060a-7145-8073-23504ae61145" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_CommonStockMember_019c6cca-060a-7145-8073-23504ae61145" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_019c6cca-060a-7737-9579-0efe72382971" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_019c6cca-060a-7737-9579-0efe72382971" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_019c6cca-060a-7e6e-b7ba-21055ebdb4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_RetainedEarningsMember_019c6cca-060a-7e6e-b7ba-21055ebdb4c3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-060a-75a0-ae0a-79d28c99a1f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-060a-75a0-ae0a-79d28c99a1f9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_019c6cca-060a-7bbe-bd84-8f7b06e9a7ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ParentMember_019c6cca-060a-7aa3-9bef-a2ddf94b2406" xlink:to="loc_us-gaap_TreasuryStockCommonMember_019c6cca-060a-7bbe-bd84-8f7b06e9a7ec" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_019c6cca-060a-7efa-ae18-d9d179719794" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c6cca-060a-7c00-afa1-d5b0f38618c4" xlink:to="loc_us-gaap_NoncontrollingInterestMember_019c6cca-060a-7efa-ae18-d9d179719794" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c6cca-060a-7437-b685-851101eed624" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_019c6cca-060a-7e51-8e4f-18f0c0304191" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c6cca-060a-7437-b685-851101eed624" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-060a-7437-b685-851101eed624_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-060a-7437-b685-851101eed624" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-060a-7437-b685-851101eed624_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-060a-7c18-b92f-929da688a0e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-060a-7437-b685-851101eed624" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-060a-7c18-b92f-929da688a0e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c6cca-060a-7221-aaa3-20ba18dde5ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c6cca-060a-7c18-b92f-929da688a0e4" xlink:to="loc_us-gaap_CommonClassAMember_019c6cca-060a-7221-aaa3-20ba18dde5ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c6cca-060a-70dc-969b-d0eabcba9b60" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019c6cca-060a-7a1b-b76a-5b54ab215382" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019c6cca-060a-7a1b-b76a-5b54ab215382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-060a-7b4f-a3b1-d814f0e0e292" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-060a-7b4f-a3b1-d814f0e0e292" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c6cca-060a-7f02-ae78-72e9af119283" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c6cca-060a-7f02-ae78-72e9af119283" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019c6cca-060a-7f6b-bb89-4c9753e8f5fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_TreasuryStockCommonShares_019c6cca-060a-7f6b-bb89-4c9753e8f5fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019c6cca-060a-7db5-947e-e60132d59f70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_019c6cca-060a-7db5-947e-e60132d59f70" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c6cca-060a-750e-942e-44823a95d56b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_019c6cca-060a-750e-942e-44823a95d56b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_019c6cca-060a-7175-a6bc-4398ac2539a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueTreasuryStockReissued_019c6cca-060a-7175-a6bc-4398ac2539a7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_019c6cca-060a-7e13-b556-0387e3d28a7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesTreasuryStockReissued_019c6cca-060a-7e13-b556-0387e3d28a7a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019c6cca-060a-76df-b1c9-759637462ae1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_019c6cca-060a-76df-b1c9-759637462ae1" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c6cca-060a-74ea-aeb0-32fdab22219d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_019c6cca-060a-74ea-aeb0-32fdab22219d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AdjustmentsToAdditionalPaidInCapitalShareBasedPaymentArrangementContributionFromEquityMethodInvestment_019c6cca-060a-7aab-82fe-bead947d43d8" xlink:href="coty-20260331.xsd#coty_AdjustmentsToAdditionalPaidInCapitalShareBasedPaymentArrangementContributionFromEquityMethodInvestment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_coty_AdjustmentsToAdditionalPaidInCapitalShareBasedPaymentArrangementContributionFromEquityMethodInvestment_019c6cca-060a-7aab-82fe-bead947d43d8" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_019c6cca-060a-770e-8d03-dc8c5197d98a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalDividendsInExcessOfRetainedEarnings_019c6cca-060a-770e-8d03-dc8c5197d98a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019c6cca-060a-7544-92a4-18b6753e33bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_019c6cca-060a-7544-92a4-18b6753e33bc" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_OtherComprehensiveIncomeLossNetOfTaxIncludingNoncontrollingInterest_019c6cca-060a-78e9-9456-1941acfce08a" xlink:href="coty-20260331.xsd#coty_OtherComprehensiveIncomeLossNetOfTaxIncludingNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_coty_OtherComprehensiveIncomeLossNetOfTaxIncludingNoncontrollingInterest_019c6cca-060a-78e9-9456-1941acfce08a" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019c6cca-060a-7234-a14c-11a4e903d4ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_019c6cca-060a-7234-a14c-11a4e903d4ae" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestChangeInRedemptionValue_019c6cca-060a-76c6-8669-25f6c5ff8716" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestChangeInRedemptionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_019c6cca-060a-702e-bfc8-23d06d78a64c" xlink:to="loc_us-gaap_MinorityInterestChangeInRedemptionValue_019c6cca-060a-76c6-8669-25f6c5ff8716" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019c6cca-060a-7763-a104-3bbb2e76ee6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-060a-7e02-8f0d-817512ad36f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c6cca-060a-73bc-9c89-87625f4c1983" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_019c6cca-060a-7f16-9bcf-52839fe833fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_019c6cca-060a-70dc-969b-d0eabcba9b60" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019c6cca-060a-76c6-9bdc-37c4984420a2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019c6cca-060a-76c6-9bdc-37c4984420a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_019c6cca-060a-7a63-a24b-3a268f37fcd5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_019c6cca-060a-7a63-a24b-3a268f37fcd5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityAccretionOfDividends_019c6cca-060a-798c-8537-4044b3e74bb0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityAccretionOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_us-gaap_TemporaryEquityAccretionOfDividends_019c6cca-060a-798c-8537-4044b3e74bb0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TemporaryEquityPaymentOfDividends_019c6cca-060a-7065-88c4-ff7b81bbf8eb" xlink:href="coty-20260331.xsd#coty_TemporaryEquityPaymentOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_coty_TemporaryEquityPaymentOfDividends_019c6cca-060a-7065-88c4-ff7b81bbf8eb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019c6cca-060a-7a0d-9be2-b4a8fb8dbcf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_019c6cca-060a-7a0d-9be2-b4a8fb8dbcf3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NoncontrollingInterestInOtherComprehensiveLossOtherNoncontrollingInterestsRedeemable_019c6cca-060a-7686-bcd8-83ef5cee0b00" xlink:href="coty-20260331.xsd#coty_NoncontrollingInterestInOtherComprehensiveLossOtherNoncontrollingInterestsRedeemable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_coty_NoncontrollingInterestInOtherComprehensiveLossOtherNoncontrollingInterestsRedeemable_019c6cca-060a-7686-bcd8-83ef5cee0b00" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TemporaryEquityDistributiontoNoncontrollingInterestsNet_019cdd13-a0d3-7c1c-80b2-aab6d30904ce" xlink:href="coty-20260331.xsd#coty_TemporaryEquityDistributiontoNoncontrollingInterestsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_coty_TemporaryEquityDistributiontoNoncontrollingInterestsNet_019cdd13-a0d3-7c1c-80b2-aab6d30904ce" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TemporaryEquityRepurchaseAdjustmentOfRedeemableNoncontrollingInterests_019c6cca-060a-7c94-8c7e-8736a8c1e605" xlink:href="coty-20260331.xsd#coty_TemporaryEquityRepurchaseAdjustmentOfRedeemableNoncontrollingInterests"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_019c6cca-060a-7766-a618-cad69cc978f9" xlink:to="loc_coty_TemporaryEquityRepurchaseAdjustmentOfRedeemableNoncontrollingInterests_019c6cca-060a-7c94-8c7e-8736a8c1e605" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019c6cca-060a-78f1-aa87-e8820fc37193" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityCarryingAmountAttributableToParent_019c6cca-060a-75cc-a34a-b57f64eda4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/SEGMENTREPORTINGScheduleofreportablesegmentsDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#SEGMENTREPORTINGScheduleofreportablesegmentsDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/SEGMENTREPORTINGScheduleofreportablesegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7a7a-befb-f5f77a245bf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7a7a-befb-f5f77a245bf6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_019c6cca-060a-7920-b150-2569074f46e3" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7a7a-befb-f5f77a245bf6" xlink:to="loc_srt_ConsolidationItemsAxis_019c6cca-060a-7920-b150-2569074f46e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c6cca-060a-7920-b150-2569074f46e3_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_019c6cca-060a-7920-b150-2569074f46e3" xlink:to="loc_srt_ConsolidationItemsDomain_019c6cca-060a-7920-b150-2569074f46e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_019c6cca-060a-79b7-bebf-c9ff7560904b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_019c6cca-060a-7920-b150-2569074f46e3" xlink:to="loc_srt_ConsolidationItemsDomain_019c6cca-060a-79b7-bebf-c9ff7560904b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_019c6cca-060a-7a88-ac07-35e015be6b35" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_019c6cca-060a-79b7-bebf-c9ff7560904b" xlink:to="loc_us-gaap_OperatingSegmentsMember_019c6cca-060a-7a88-ac07-35e015be6b35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-70eb-90f7-864a81582120" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7a7a-befb-f5f77a245bf6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-70eb-90f7-864a81582120" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c6cca-060a-70eb-90f7-864a81582120_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-70eb-90f7-864a81582120" xlink:to="loc_us-gaap_SegmentDomain_019c6cca-060a-70eb-90f7-864a81582120_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c6cca-060a-732a-bd16-286f0f36a5d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-70eb-90f7-864a81582120" xlink:to="loc_us-gaap_SegmentDomain_019c6cca-060a-732a-bd16-286f0f36a5d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PrestigeMember_019c6cca-060a-727d-b225-4092ffffeded" xlink:href="coty-20260331.xsd#coty_PrestigeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c6cca-060a-732a-bd16-286f0f36a5d9" xlink:to="loc_coty_PrestigeMember_019c6cca-060a-727d-b225-4092ffffeded" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ConsumerBeautyMember_019c6cca-060a-7b45-9250-61c037d7cc92" xlink:href="coty-20260331.xsd#coty_ConsumerBeautyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c6cca-060a-732a-bd16-286f0f36a5d9" xlink:to="loc_coty_ConsumerBeautyMember_019c6cca-060a-7b45-9250-61c037d7cc92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateMember_019c6cca-060a-7098-953a-2a7021884c38" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c6cca-060a-732a-bd16-286f0f36a5d9" xlink:to="loc_us-gaap_CorporateMember_019c6cca-060a-7098-953a-2a7021884c38" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NumberOfReportableSegmentsNotDisclosedFlag_019c6cca-060a-74de-8a69-cf61efea673f" xlink:href="coty-20260331.xsd#coty_NumberOfReportableSegmentsNotDisclosedFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_coty_NumberOfReportableSegmentsNotDisclosedFlag_019c6cca-060a-74de-8a69-cf61efea673f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c6cca-060a-72fe-99ca-fa2f039b7489" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c6cca-060a-72fe-99ca-fa2f039b7489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_019c6cca-060a-7f39-969f-a00a6114a953" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfGoodsAndServicesSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_019c6cca-060a-7f39-969f-a00a6114a953" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_019c6cca-060a-7138-bcd7-52148319f266" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketingAndAdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_019c6cca-060a-7138-bcd7-52148319f266" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingOtherItemAmount_019c6cca-060a-79b7-99d9-397b8a9166c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingOtherItemAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_SegmentReportingOtherItemAmount_019c6cca-060a-79b7-99d9-397b8a9166c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019c6cca-060a-7860-8d79-6b680a1e6c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_OperatingIncomeLoss_019c6cca-060a-7860-8d79-6b680a1e6c9f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019c6cca-060a-7e91-8f4d-46ede294a614" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeExpenseNonoperatingNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_InterestIncomeExpenseNonoperatingNet_019c6cca-060a-7e91-8f4d-46ede294a614" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019c6cca-060a-7168-8510-847993c6b702" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019c6cca-060a-7168-8510-847993c6b702" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019c6cca-060a-7d4f-914c-31559bfe0198" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019c6cca-060a-7d4f-914c-31559bfe0198" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019c6cca-060a-7838-aee6-9a454b98b98f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7955-857a-8c168564d1ec" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019c6cca-060a-7838-aee6-9a454b98b98f" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/SEGMENTREPORTINGScheduleofpercentageofrevenuesassociatedwithproductcategoriesDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#SEGMENTREPORTINGScheduleofpercentageofrevenuesassociatedwithproductcategoriesDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/SEGMENTREPORTINGScheduleofpercentageofrevenuesassociatedwithproductcategoriesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7b34-ac5d-0d27c5849e88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7e9e-aada-d494c89b36fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7b34-ac5d-0d27c5849e88" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7e9e-aada-d494c89b36fb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_019c6cca-060a-7706-a363-976afd14c4c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7e9e-aada-d494c89b36fb" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_019c6cca-060a-7706-a363-976afd14c4c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c6cca-060a-7706-a363-976afd14c4c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c6cca-060a-7706-a363-976afd14c4c1" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c6cca-060a-7706-a363-976afd14c4c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_019c6cca-060a-7bc0-b7b0-7b245503d7ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_019c6cca-060a-7706-a363-976afd14c4c1" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_019c6cca-060a-7bc0-b7b0-7b245503d7ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductConcentrationRiskMember_019c6cca-060a-7c2b-85df-7d9ae19697b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProductConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_019c6cca-060a-7bc0-b7b0-7b245503d7ba" xlink:to="loc_us-gaap_ProductConcentrationRiskMember_019c6cca-060a-7c2b-85df-7d9ae19697b4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c6cca-060a-707f-a83c-fcfaa8cb61fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7e9e-aada-d494c89b36fb" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c6cca-060a-707f-a83c-fcfaa8cb61fb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c6cca-060a-707f-a83c-fcfaa8cb61fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c6cca-060a-707f-a83c-fcfaa8cb61fb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c6cca-060a-707f-a83c-fcfaa8cb61fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c6cca-060a-7645-9b6b-2c1f8c420818" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_019c6cca-060a-707f-a83c-fcfaa8cb61fb" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c6cca-060a-7645-9b6b-2c1f8c420818" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerProductAndServiceBenchmarkMember_019c6cca-060a-7750-9322-254a32ae205b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerProductAndServiceBenchmarkMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_019c6cca-060a-7645-9b6b-2c1f8c420818" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerProductAndServiceBenchmarkMember_019c6cca-060a-7750-9322-254a32ae205b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_019c6cca-060a-727f-bf6f-e0a4ff7f73a6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_019c6cca-060a-7e9e-aada-d494c89b36fb" xlink:to="loc_srt_ProductOrServiceAxis_019c6cca-060a-727f-bf6f-e0a4ff7f73a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c6cca-060a-727f-bf6f-e0a4ff7f73a6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_019c6cca-060a-727f-bf6f-e0a4ff7f73a6" xlink:to="loc_srt_ProductsAndServicesDomain_019c6cca-060a-727f-bf6f-e0a4ff7f73a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_019c6cca-060a-727f-bf6f-e0a4ff7f73a6" xlink:to="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_FragrancesMember_019c6cca-060a-720f-89ac-d3d10a3134e0" xlink:href="coty-20260331.xsd#coty_FragrancesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:to="loc_coty_FragrancesMember_019c6cca-060a-720f-89ac-d3d10a3134e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ColorCosmeticsMember_019c6cca-060a-7951-9c46-735f21889ce1" xlink:href="coty-20260331.xsd#coty_ColorCosmeticsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:to="loc_coty_ColorCosmeticsMember_019c6cca-060a-7951-9c46-735f21889ce1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BodyCareAndOtherMember_019c6cca-060a-7276-a452-d72782b38ef0" xlink:href="coty-20260331.xsd#coty_BodyCareAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:to="loc_coty_BodyCareAndOtherMember_019c6cca-060a-7276-a452-d72782b38ef0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_SkincareMember_019c6cca-060a-7fd9-aa88-d8d1ce42e487" xlink:href="coty-20260331.xsd#coty_SkincareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_019c6cca-060a-7dc9-aeb4-e768316421c9" xlink:to="loc_coty_SkincareMember_019c6cca-060a-7fd9-aa88-d8d1ce42e487" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_019c6cca-060a-796d-b7d7-49e5b0b0446f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_019c6cca-060a-7b34-ac5d-0d27c5849e88" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_019c6cca-060a-796d-b7d7-49e5b0b0446f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/RESTRUCTURINGCOSTSScheduleofrestructuringcostsDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#RESTRUCTURINGCOSTSScheduleofrestructuringcostsDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/RESTRUCTURINGCOSTSScheduleofrestructuringcostsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7e57-96ce-50d6addb4bf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-72ec-8b5a-bb9a8f036968" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7e57-96ce-50d6addb4bf3" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-72ec-8b5a-bb9a8f036968" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7e61-963a-a882b2de5fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-72ec-8b5a-bb9a8f036968" xlink:to="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7e61-963a-a882b2de5fbd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-7e61-963a-a882b2de5fbd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7e61-963a-a882b2de5fbd" xlink:to="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-7e61-963a-a882b2de5fbd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-779c-9222-fa7a2397be1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7e61-963a-a882b2de5fbd" xlink:to="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-779c-9222-fa7a2397be1c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_FixedCostReductionPlanMember_019c6cca-060a-7b9f-a557-58b0c1433482" xlink:href="coty-20260331.xsd#coty_FixedCostReductionPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-779c-9222-fa7a2397be1c" xlink:to="loc_coty_FixedCostReductionPlanMember_019c6cca-060a-7b9f-a557-58b0c1433482" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_CurrentRestructuringActionsAndOtherCostsMember_019c6cca-060a-7e9f-b6fe-c3484e400ed5" xlink:href="coty-20260331.xsd#coty_CurrentRestructuringActionsAndOtherCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-779c-9222-fa7a2397be1c" xlink:to="loc_coty_CurrentRestructuringActionsAndOtherCostsMember_019c6cca-060a-7e9f-b6fe-c3484e400ed5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCharges_019c6cca-060a-7492-9dcb-44c20eedb1b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7e57-96ce-50d6addb4bf3" xlink:to="loc_us-gaap_RestructuringCharges_019c6cca-060a-7492-9dcb-44c20eedb1b1" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/RESTRUCTURINGCOSTSNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#RESTRUCTURINGCOSTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/RESTRUCTURINGCOSTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7074-9bd1-06ca712a2ab5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-7db2-901f-9e95171a1429" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7074-9bd1-06ca712a2ab5" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-7db2-901f-9e95171a1429" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7264-8a61-1256605cf84c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-7db2-901f-9e95171a1429" xlink:to="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7264-8a61-1256605cf84c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-7264-8a61-1256605cf84c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7264-8a61-1256605cf84c" xlink:to="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-7264-8a61-1256605cf84c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-766b-860a-feff1b35e478" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringPlanDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RestructuringPlanAxis_019c6cca-060a-7264-8a61-1256605cf84c" xlink:to="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-766b-860a-feff1b35e478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_FixedCostReductionPlanMember_019c6cca-060a-77a7-b1f7-cc3bb21e99a1" xlink:href="coty-20260331.xsd#coty_FixedCostReductionPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-766b-860a-feff1b35e478" xlink:to="loc_coty_FixedCostReductionPlanMember_019c6cca-060a-77a7-b1f7-cc3bb21e99a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_CurrentRestructuringActionsAndOtherCostsMember_019c6cca-060a-730f-b8a8-bf85b1bbb65d" xlink:href="coty-20260331.xsd#coty_CurrentRestructuringActionsAndOtherCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringPlanDomain_019c6cca-060a-766b-860a-feff1b35e478" xlink:to="loc_coty_CurrentRestructuringActionsAndOtherCostsMember_019c6cca-060a-730f-b8a8-bf85b1bbb65d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_019c6cca-060a-7bef-aa42-5f811755e753" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_019c6cca-060a-7db2-901f-9e95171a1429" xlink:to="loc_srt_StatementScenarioAxis_019c6cca-060a-7bef-aa42-5f811755e753" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c6cca-060a-7bef-aa42-5f811755e753_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_019c6cca-060a-7bef-aa42-5f811755e753" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c6cca-060a-7bef-aa42-5f811755e753_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_019c6cca-060a-7cae-bbca-e7a2660c2e59" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_019c6cca-060a-7bef-aa42-5f811755e753" xlink:to="loc_srt_ScenarioUnspecifiedDomain_019c6cca-060a-7cae-bbca-e7a2660c2e59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_019c6cca-060a-7c1d-b5be-437aa23fffe5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_019c6cca-060a-7cae-bbca-e7a2660c2e59" xlink:to="loc_srt_ScenarioForecastMember_019c6cca-060a-7c1d-b5be-437aa23fffe5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringReserve_019c6cca-060a-78c4-9d5c-2d22059a8255" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestructuringReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7074-9bd1-06ca712a2ab5" xlink:to="loc_us-gaap_RestructuringReserve_019c6cca-060a-78c4-9d5c-2d22059a8255" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRestructuring_019c6cca-060a-7b3f-b5be-41f26a8b1b22" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRestructuring"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_019c6cca-060a-7074-9bd1-06ca712a2ab5" xlink:to="loc_us-gaap_PaymentsForRestructuring_019c6cca-060a-7b3f-b5be-41f26a8b1b22" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYINVESTMENTNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYINVESTMENTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYINVESTMENTNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-751a-bae7-627fa3c36cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-751a-bae7-627fa3c36cf4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7d9f-afc9-7cfd23b14322" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-751a-bae7-627fa3c36cf4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7d9f-afc9-7cfd23b14322" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7d9f-afc9-7cfd23b14322_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7d9f-afc9-7cfd23b14322" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7d9f-afc9-7cfd23b14322_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7345-95b3-7accacad8ee0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7d9f-afc9-7cfd23b14322" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7345-95b3-7accacad8ee0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_WellaCompanyMember_019c6cca-060a-7079-b48d-6f1a2daab571" xlink:href="coty-20260331.xsd#coty_WellaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7345-95b3-7accacad8ee0" xlink:to="loc_coty_WellaCompanyMember_019c6cca-060a-7079-b48d-6f1a2daab571" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019c6cca-060a-748a-8945-60a16b8c45a7" xlink:href="coty-20260331.xsd#coty_EquityMethodInvestmentOwnershipPercentageSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019c6cca-060a-748a-8945-60a16b8c45a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019c6cca-060a-7c77-a3b9-1aca73c19540" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019c6cca-060a-7c77-a3b9-1aca73c19540" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity_019c6cca-060a-7921-852a-23b1728e610d" xlink:href="coty-20260331.xsd#coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity_019c6cca-060a-7921-852a-23b1728e610d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1_019c6cca-060a-700d-a667-3e86df841224" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1_019c6cca-060a-700d-a667-3e86df841224" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019c6cca-060a-7423-8bb9-fc48c3bbd46c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-759d-ae92-2136d6e2f5af" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019c6cca-060a-7423-8bb9-fc48c3bbd46c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYINVESTMENTScheduleofotherexpenseincomeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYINVESTMENTScheduleofotherexpenseincomeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYINVESTMENTScheduleofotherexpenseincomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-79c9-9365-276bae969bc3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-79c9-9365-276bae969bc3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7f4a-985e-fbc37d8ea0b6" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-79c9-9365-276bae969bc3" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7f4a-985e-fbc37d8ea0b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7f4a-985e-fbc37d8ea0b6_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7f4a-985e-fbc37d8ea0b6" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7f4a-985e-fbc37d8ea0b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7f1b-8cd5-910d0c5726b9" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7f4a-985e-fbc37d8ea0b6" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7f1b-8cd5-910d0c5726b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_WellaCompanyMember_019c6cca-060a-701d-a35c-46468f51319d" xlink:href="coty-20260331.xsd#coty_WellaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7f1b-8cd5-910d0c5726b9" xlink:to="loc_coty_WellaCompanyMember_019c6cca-060a-701d-a35c-46468f51319d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019c6cca-060a-766c-9050-b2bd609853bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_us-gaap_ProceedsFromSaleOfEquityMethodInvestments_019c6cca-060a-766c-9050-b2bd609853bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity_019c6cca-060a-77d9-b596-7b17503223d4" xlink:href="coty-20260331.xsd#coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_coty_DisposalGroupIncludingDiscontinuedOperationConsiderationEquity_019c6cca-060a-77d9-b596-7b17503223d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1_019c6cca-060a-7c69-ad13-f8cb2dc9bd78" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_us-gaap_NoncashOrPartNoncashDivestitureAmountOfConsiderationReceived1_019c6cca-060a-7c69-ad13-f8cb2dc9bd78" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquitySecuritiesFVNIInvestmentCarryingValue_019c6cca-060a-7aac-8abf-adcab91dd746" xlink:href="coty-20260331.xsd#coty_EquitySecuritiesFVNIInvestmentCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_coty_EquitySecuritiesFVNIInvestmentCarryingValue_019c6cca-060a-7aac-8abf-adcab91dd746" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquitySecuritiesFVNITransactionAndOtherCostsToSell_019c6cca-060a-71e1-b4fd-37aeb48a7b33" xlink:href="coty-20260331.xsd#coty_EquitySecuritiesFVNITransactionAndOtherCostsToSell"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_coty_EquitySecuritiesFVNITransactionAndOtherCostsToSell_019c6cca-060a-71e1-b4fd-37aeb48a7b33" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019c6cca-060a-75a4-bbb7-4ba0467e5ffc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a69-afc0-92d06ee1ed73" xlink:to="loc_us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal_019c6cca-060a-75a4-bbb7-4ba0467e5ffc" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYINVESTMENTScheduleofequityinvestmentsDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYINVESTMENTScheduleofequityinvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYINVESTMENTScheduleofequityinvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a61-bc05-2777424f2739" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-7ecf-a70e-f86e50d2b107" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a61-bc05-2777424f2739" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-7ecf-a70e-f86e50d2b107" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-77e4-a361-753c3bdba45b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-7ecf-a70e-f86e50d2b107" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-77e4-a361-753c3bdba45b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-77e4-a361-753c3bdba45b_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-77e4-a361-753c3bdba45b" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-77e4-a361-753c3bdba45b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7dbb-80b8-f42c43395413" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-77e4-a361-753c3bdba45b" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7dbb-80b8-f42c43395413" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_WellaCompanyMember_019c6cca-060a-75ab-af60-14882633e96e" xlink:href="coty-20260331.xsd#coty_WellaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7dbb-80b8-f42c43395413" xlink:to="loc_coty_WellaCompanyMember_019c6cca-060a-75ab-af60-14882633e96e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFVNINoncurrent_019c6cca-060a-7ea7-9315-f788d01e9b11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFVNINoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a61-bc05-2777424f2739" xlink:to="loc_us-gaap_EquitySecuritiesFVNINoncurrent_019c6cca-060a-7ea7-9315-f788d01e9b11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019dd5f8-d812-7633-9101-097268c1622d" xlink:href="coty-20260331.xsd#coty_EquityMethodInvestmentOwnershipPercentageSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7a61-bc05-2777424f2739" xlink:to="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019dd5f8-d812-7633-9101-097268c1622d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYINVESTMENTScheduleofmovementinequityinvestmentsDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYINVESTMENTScheduleofmovementinequityinvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYINVESTMENTScheduleofmovementinequityinvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-72f4-8048-3f11ab150df5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-72f4-8048-3f11ab150df5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7c74-b68f-d164944492a7" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-72f4-8048-3f11ab150df5" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7c74-b68f-d164944492a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7c74-b68f-d164944492a7_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7c74-b68f-d164944492a7" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7c74-b68f-d164944492a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7672-b9a1-957eec83e76c" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-060a-7c74-b68f-d164944492a7" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7672-b9a1-957eec83e76c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_KKWBeautyAndWellaMember_019c6cca-060a-725a-b3f4-3439db91fa5c" xlink:href="coty-20260331.xsd#coty_KKWBeautyAndWellaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-060a-7672-b9a1-957eec83e76c" xlink:to="loc_coty_KKWBeautyAndWellaMember_019c6cca-060a-725a-b3f4-3439db91fa5c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c6cca-060a-77ac-a9ca-b6eed9447de2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsTable_019c6cca-060a-72f4-8048-3f11ab150df5" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c6cca-060a-77ac-a9ca-b6eed9447de2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c6cca-060a-77ac-a9ca-b6eed9447de2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c6cca-060a-77ac-a9ca-b6eed9447de2" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c6cca-060a-77ac-a9ca-b6eed9447de2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c6cca-060a-702e-b89a-8510e6273df7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeAxis_019c6cca-060a-77ac-a9ca-b6eed9447de2" xlink:to="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c6cca-060a-702e-b89a-8510e6273df7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_KKWBeautyAndWellaMember_019c6cca-060a-7a79-a394-b10f5e5fd730" xlink:href="coty-20260331.xsd#coty_KKWBeautyAndWellaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvestmentNonconsolidatedInvesteeDomain_019c6cca-060a-702e-b89a-8510e6273df7" xlink:to="loc_coty_KKWBeautyAndWellaMember_019c6cca-060a-7a79-a394-b10f5e5fd730" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c6cca-060a-7317-953b-bb756bdd0d0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_019c6cca-060a-7317-953b-bb756bdd0d0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019c6cca-060a-79c4-974d-ecd15aac0109" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_GrossProfit_019c6cca-060a-79c4-974d-ecd15aac0109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019c6cca-060a-7844-bba7-63a0d8dda552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_OperatingIncomeLoss_019c6cca-060a-7844-bba7-63a0d8dda552" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019c6cca-060a-744f-96c0-e3f08cec07e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019c6cca-060a-744f-96c0-e3f08cec07e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_019c6cca-060a-7632-b27e-681c24e3e6d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_019c6cca-060a-7932-9d95-4c115d0dcb05" xlink:to="loc_us-gaap_ProfitLoss_019c6cca-060a-7632-b27e-681c24e3e6d7" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#GOODWILLANDOTHERINTANGIBLEASSETSNETNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_019df23b-1abe-755e-af3f-6e364d8efee8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_019df23b-1abe-755e-af3f-6e364d8efee8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_019df374-a6c3-78e1-af9b-06002ebdc03f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019df23b-1abe-755e-af3f-6e364d8efee8" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_019df374-a6c3-78e1-af9b-06002ebdc03f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-78e1-af9b-06002ebdc03f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019df374-a6c3-78e1-af9b-06002ebdc03f" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-78e1-af9b-06002ebdc03f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-7eb6-b314-e0df25c4da3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_019df374-a6c3-78e1-af9b-06002ebdc03f" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-7eb6-b314-e0df25c4da3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputLongTermRevenueGrowthRateMember_019df378-9b32-7648-a3a7-e0fe31b50124" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputLongTermRevenueGrowthRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-7eb6-b314-e0df25c4da3d" xlink:to="loc_us-gaap_MeasurementInputLongTermRevenueGrowthRateMember_019df378-9b32-7648-a3a7-e0fe31b50124" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputInceptionDiscountRateMember_019df379-0345-7a07-9390-ef580e2f98bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputInceptionDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_019df374-a6c3-7eb6-b314-e0df25c4da3d" xlink:to="loc_us-gaap_MeasurementInputInceptionDiscountRateMember_019df379-0345-7a07-9390-ef580e2f98bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitAxis_019df375-0995-770a-9f16-5ea88dd604ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReportingUnitAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019df23b-1abe-755e-af3f-6e364d8efee8" xlink:to="loc_us-gaap_ReportingUnitAxis_019df375-0995-770a-9f16-5ea88dd604ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019df375-0995-770a-9f16-5ea88dd604ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ReportingUnitAxis_019df375-0995-770a-9f16-5ea88dd604ae" xlink:to="loc_us-gaap_ReportingUnitDomain_019df375-0995-770a-9f16-5ea88dd604ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReportingUnitDomain_019df375-0995-76a3-8083-d1bdf24bae44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReportingUnitDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ReportingUnitAxis_019df375-0995-770a-9f16-5ea88dd604ae" xlink:to="loc_us-gaap_ReportingUnitDomain_019df375-0995-76a3-8083-d1bdf24bae44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ConsumerBeautyMember_019df23e-7e24-7c4d-999b-dc25af3164b0" xlink:href="coty-20260331.xsd#coty_ConsumerBeautyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReportingUnitDomain_019df375-0995-76a3-8083-d1bdf24bae44" xlink:to="loc_coty_ConsumerBeautyMember_019df23e-7e24-7c4d-999b-dc25af3164b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019df37d-ffaa-7171-b199-a23229ad1dae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019df23b-1abe-755e-af3f-6e364d8efee8" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019df37d-ffaa-7171-b199-a23229ad1dae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7171-b199-a23229ad1dae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019df37d-ffaa-7171-b199-a23229ad1dae" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7171-b199-a23229ad1dae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019df37d-ffaa-7171-b199-a23229ad1dae" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_CoverGirlTrademarksMember_019df249-0bc2-7667-861e-1d80066cad76" xlink:href="coty-20260331.xsd#coty_CoverGirlTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:to="loc_coty_CoverGirlTrademarksMember_019df249-0bc2-7667-861e-1d80066cad76" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_SallyHansenTrademarksMember_019df249-71a0-7711-ae03-b053b9b9f168" xlink:href="coty-20260331.xsd#coty_SallyHansenTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:to="loc_coty_SallyHansenTrademarksMember_019df249-71a0-7711-ae03-b053b9b9f168" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_MaxFactorTrademarksMember_019df250-4bb4-7a23-a73c-b655036687b7" xlink:href="coty-20260331.xsd#coty_MaxFactorTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:to="loc_coty_MaxFactorTrademarksMember_019df250-4bb4-7a23-a73c-b655036687b7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BourjoisTrademarksMember_019df251-6a59-7854-9a46-6e0ce764baf2" xlink:href="coty-20260331.xsd#coty_BourjoisTrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019df37d-ffaa-7d71-adae-de0388403467" xlink:to="loc_coty_BourjoisTrademarksMember_019df251-6a59-7854-9a46-6e0ce764baf2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_GoodwillMeasurementInput_019df378-9b32-72e8-801a-3ad7db5c9e93" xlink:href="coty-20260331.xsd#coty_GoodwillMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_coty_GoodwillMeasurementInput_019df378-9b32-72e8-801a-3ad7db5c9e93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IndefiniteLivedIntangibleAssetMeasurementInput_019df37d-7d32-7b5d-82b8-f1898cd687b7" xlink:href="coty-20260331.xsd#coty_IndefiniteLivedIntangibleAssetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_coty_IndefiniteLivedIntangibleAssetMeasurementInput_019df37d-7d32-7b5d-82b8-f1898cd687b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_019db46e-73f9-71cd-ba4b-b32d0ce0dacf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_us-gaap_AssetImpairmentCharges_019db46e-73f9-71cd-ba4b-b32d0ce0dacf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019db475-60fd-70a7-8807-fba4dfd9b1c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019db475-60fd-70a7-8807-fba4dfd9b1c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019db476-bd56-7b51-bf95-8991bc80609b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_019db476-bd56-7b51-bf95-8991bc80609b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019c6cca-060a-7f1d-ba54-4728ae768446" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019df23b-1abe-7f20-8925-9feb1749e82b" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019c6cca-060a-7f1d-ba54-4728ae768446" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofgoodwillDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofgoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofgoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_019c6cca-060a-7d41-8fd1-775aed5b84e3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_019c6cca-060a-7277-a20c-c836b1f5a5a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_019c6cca-060a-7d41-8fd1-775aed5b84e3" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_019c6cca-060a-7277-a20c-c836b1f5a5a1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-75fb-853a-8c0f6dcb2191" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_019c6cca-060a-7277-a20c-c836b1f5a5a1" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-75fb-853a-8c0f6dcb2191" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c6cca-060a-75fb-853a-8c0f6dcb2191_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-75fb-853a-8c0f6dcb2191" xlink:to="loc_us-gaap_SegmentDomain_019c6cca-060a-75fb-853a-8c0f6dcb2191_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_019c6cca-060a-7174-a36a-8b38d27241cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_019c6cca-060a-75fb-853a-8c0f6dcb2191" xlink:to="loc_us-gaap_SegmentDomain_019c6cca-060a-7174-a36a-8b38d27241cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PrestigeMember_019c6cca-060a-7094-b172-bb4ee632217f" xlink:href="coty-20260331.xsd#coty_PrestigeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c6cca-060a-7174-a36a-8b38d27241cc" xlink:to="loc_coty_PrestigeMember_019c6cca-060a-7094-b172-bb4ee632217f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ConsumerBeautyMember_019c6cca-060a-7a6c-bc02-75a9f00fbbc1" xlink:href="coty-20260331.xsd#coty_ConsumerBeautyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_019c6cca-060a-7174-a36a-8b38d27241cc" xlink:to="loc_coty_ConsumerBeautyMember_019c6cca-060a-7a6c-bc02-75a9f00fbbc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_019c6cca-060a-7d41-8fd1-775aed5b84e3" xlink:to="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_019c6cca-060a-77a3-b1f9-8ff9bee8cdf3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:to="loc_us-gaap_GoodwillGross_019c6cca-060a-77a3-b1f9-8ff9bee8cdf3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019c6cca-060a-7c89-a3d6-72035905dfa7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019c6cca-060a-7c89-a3d6-72035905dfa7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c6cca-060a-77bf-ac76-23e3269b7981" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:to="loc_us-gaap_Goodwill_019c6cca-060a-77bf-ac76-23e3269b7981" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019c6cca-060a-7666-88cb-6ad111276156" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:to="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_019c6cca-060a-7666-88cb-6ad111276156" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_019db482-e7c0-755a-bf2a-abc88d6dc441" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_019c6cca-060a-735e-ac50-da84128a17c5" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_019db482-e7c0-755a-bf2a-abc88d6dc441" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_019c6cca-060a-7e9e-a0cc-57bfb2e5fc82" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_019c6cca-060a-712c-9a63-dbc4cdf79967" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019c6cca-060a-7ad1-88a2-f40edeb6de59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofindefinitelivedintangibleassetsDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofindefinitelivedintangibleassetsDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofindefinitelivedintangibleassetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019c6cca-060a-7ad2-9ebb-5b7a4256a133" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019c6cca-060a-7560-a1a6-f0310fee5337" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019c6cca-060a-7ad2-9ebb-5b7a4256a133" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019c6cca-060a-7560-a1a6-f0310fee5337" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-7731-8681-32a0342be9cd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_019c6cca-060a-7560-a1a6-f0310fee5337" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-7731-8681-32a0342be9cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-7731-8681-32a0342be9cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-7731-8681-32a0342be9cd" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-7731-8681-32a0342be9cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-7a70-b389-0e61bdbd4619" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-7731-8681-32a0342be9cd" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-7a70-b389-0e61bdbd4619" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_019c6cca-060a-7066-94a5-8a962eb9d832" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-7a70-b389-0e61bdbd4619" xlink:to="loc_us-gaap_TrademarksMember_019c6cca-060a-7066-94a5-8a962eb9d832" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_019c6cca-060a-7ad2-9ebb-5b7a4256a133" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross_019c6cca-060a-76e3-8920-0f824fbafbc5" xlink:href="coty-20260331.xsd#coty_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:to="loc_coty_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross_019c6cca-060a-76e3-8920-0f824fbafbc5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AccumulatedImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwill_019c6cca-060a-79cf-930f-2436692a2308" xlink:href="coty-20260331.xsd#coty_AccumulatedImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:to="loc_coty_AccumulatedImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwill_019c6cca-060a-79cf-930f-2436692a2308" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019c6cca-060a-7a95-ac53-407ccfd2a0ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019c6cca-060a-7a95-ac53-407ccfd2a0ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss_019c6cca-060a-7bd1-9c9c-0b9278d168e7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsForeignCurrencyTranslationGainLoss_019c6cca-060a-7bd1-9c9c-0b9278d168e7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019db485-e96c-718d-95b8-5e7b028b5320" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsRollForward_019c6cca-060a-7592-90d6-385e1ba7d630" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsExcludingGoodwill_019db485-e96c-718d-95b8-5e7b028b5320" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross_019c6cca-060a-721d-be63-826c553f2f6c" xlink:href="coty-20260331.xsd#coty_IndefiniteLivedIntangibleAssetsExcludingGoodwillGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AccumulatedImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwill_019c6cca-060a-76e6-98a2-3991743f7665" xlink:href="coty-20260331.xsd#coty_AccumulatedImpairmentOfIntangibleAssetsIndefiniteLivedExcludingGoodwill"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_019c6cca-060a-73bf-9037-c6da9340458b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofintangibleassetssubjecttoamortizationDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofintangibleassetssubjecttoamortizationDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/GOODWILLANDOTHERINTANGIBLEASSETSNETScheduleofintangibleassetssubjecttoamortizationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c6cca-060a-7e83-b371-c8b6af7c9211" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c6cca-060a-7e83-b371-c8b6af7c9211" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-70cc-a7da-168c2db43775" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_019c6cca-060a-7e83-b371-c8b6af7c9211" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-70cc-a7da-168c2db43775" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-70cc-a7da-168c2db43775_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-70cc-a7da-168c2db43775" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-70cc-a7da-168c2db43775_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_019c6cca-060a-70cc-a7da-168c2db43775" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_LicensingAndCollaborationAgreementsMember_019c6cca-060a-752b-b9c1-d046451ffa29" xlink:href="coty-20260331.xsd#coty_LicensingAndCollaborationAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:to="loc_coty_LicensingAndCollaborationAgreementsMember_019c6cca-060a-752b-b9c1-d046451ffa29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_019c6cca-060a-7d52-9ab9-345cf66b44e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:to="loc_us-gaap_CustomerRelationshipsMember_019c6cca-060a-7d52-9ab9-345cf66b44e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksMember_019c6cca-060a-7c48-8112-a48c06730846" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrademarksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:to="loc_us-gaap_TrademarksMember_019c6cca-060a-7c48-8112-a48c06730846" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ProductFormulationsandTechnologyMember_019c6cca-060a-702e-b4b6-c43d0464a4c3" xlink:href="coty-20260331.xsd#coty_ProductFormulationsandTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_019c6cca-060a-77d4-9bf3-e73588c9e420" xlink:to="loc_coty_ProductFormulationsandTechnologyMember_019c6cca-060a-702e-b4b6-c43d0464a4c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019c6cca-060a-75f2-8fb1-e0bb515d3e7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019c6cca-060a-75f2-8fb1-e0bb515d3e7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019c6cca-060a-7cf5-8abb-6d0567bc5ace" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019c6cca-060a-7cf5-8abb-6d0567bc5ace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_FiniteLivedIntangibleAssetsAccumulatedImpairment_019c6cca-060a-7047-b1f3-af62747cab84" xlink:href="coty-20260331.xsd#coty_FiniteLivedIntangibleAssetsAccumulatedImpairment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:to="loc_coty_FiniteLivedIntangibleAssetsAccumulatedImpairment_019c6cca-060a-7047-b1f3-af62747cab84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c6cca-060a-77b7-ba3a-7af1f5b9b7a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_019c6cca-060a-7f02-9cef-2300a83f2f3d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019c6cca-060a-77b7-ba3a-7af1f5b9b7a8" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/LEASESNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#LEASESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/LEASESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c6cca-060a-7743-9da6-d08db5c9c77c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_019c6cca-060a-7e90-ab87-a64da7e937f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c6cca-060a-7743-9da6-d08db5c9c77c" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_019c6cca-060a-7e90-ab87-a64da7e937f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c6cca-060a-7e1a-acad-fc6b6b8e2d46" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_019c6cca-060a-7e90-ab87-a64da7e937f7" xlink:to="loc_srt_RangeAxis_019c6cca-060a-7e1a-acad-fc6b6b8e2d46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060a-7e1a-acad-fc6b6b8e2d46_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c6cca-060a-7e1a-acad-fc6b6b8e2d46" xlink:to="loc_srt_RangeMember_019c6cca-060a-7e1a-acad-fc6b6b8e2d46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060a-7683-a5d7-3510a80e9ea0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c6cca-060a-7e1a-acad-fc6b6b8e2d46" xlink:to="loc_srt_RangeMember_019c6cca-060a-7683-a5d7-3510a80e9ea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c6cca-060a-7a6f-9d6b-871a2a98d468" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060a-7683-a5d7-3510a80e9ea0" xlink:to="loc_srt_MinimumMember_019c6cca-060a-7a6f-9d6b-871a2a98d468" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c6cca-060a-7bd7-b289-8f90b923f80d" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060a-7683-a5d7-3510a80e9ea0" xlink:to="loc_srt_MaximumMember_019c6cca-060a-7bd7-b289-8f90b923f80d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019c6cca-060a-7556-be34-a831e4a7a6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_019c6cca-060a-7743-9da6-d08db5c9c77c" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_019c6cca-060a-7556-be34-a831e4a7a6a5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTScheduleofdebtDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTScheduleofdebtDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTScheduleofdebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7a1c-aa0a-6606e79ddf10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7a1c-aa0a-6606e79ddf10" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060a-7779-ace0-96c0030a91f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7a1c-aa0a-6606e79ddf10" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060a-7779-ace0-96c0030a91f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7779-ace0-96c0030a91f1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060a-7779-ace0-96c0030a91f1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7779-ace0-96c0030a91f1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7c54-a29b-052e4633dbed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060a-7779-ace0-96c0030a91f1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7c54-a29b-052e4633dbed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019c6cca-060a-7042-9f52-bd9e233327e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7c54-a29b-052e4633dbed" xlink:to="loc_us-gaap_SeniorNotesMember_019c6cca-060a-7042-9f52-bd9e233327e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c6cca-060a-74ff-83ae-0aaf68522f20" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060a-7c54-a29b-052e4633dbed" xlink:to="loc_us-gaap_LineOfCreditMember_019c6cca-060a-74ff-83ae-0aaf68522f20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7643-b320-25ac26ff4152" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7a1c-aa0a-6606e79ddf10" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7643-b320-25ac26ff4152" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7643-b320-25ac26ff4152_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7643-b320-25ac26ff4152" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7643-b320-25ac26ff4152_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7643-b320-25ac26ff4152" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026DollarSeniorSecuredNotesDueApril2026Member_019c6cca-060a-703b-b663-735bb793fd8d" xlink:href="coty-20260331.xsd#coty_A2026DollarSeniorSecuredNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2026DollarSeniorSecuredNotesDueApril2026Member_019c6cca-060a-703b-b663-735bb793fd8d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019c6cca-060a-7f58-8cce-7674f3309bbe" xlink:href="coty-20260331.xsd#coty_A2026EuroSeniorSecuredNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019c6cca-060a-7f58-8cce-7674f3309bbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2027EuroSeniorSecuredNotesDueMay2027Member_019c6cca-060a-7bea-af37-24ef49139984" xlink:href="coty-20260331.xsd#coty_A2027EuroSeniorSecuredNotesDueMay2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2027EuroSeniorSecuredNotesDueMay2027Member_019c6cca-060a-7bea-af37-24ef49139984" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member_019c6cca-060a-712b-ae80-69a7021ce3ae" xlink:href="coty-20260331.xsd#coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member_019c6cca-060a-712b-ae80-69a7021ce3ae" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060a-74e0-8915-fad5dc7e7530" xlink:href="coty-20260331.xsd#coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060a-74e0-8915-fad5dc7e7530" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060a-76bf-b839-359189098aae" xlink:href="coty-20260331.xsd#coty_A2030DollarSeniorSecuredNotesDueJuly2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060a-76bf-b839-359189098aae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019c6cca-060a-7159-9b0b-af6228f53580" xlink:href="coty-20260331.xsd#coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019c6cca-060a-7159-9b0b-af6228f53580" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2023CotyRevolvingCreditFacilityDueJuly2028Member_019c6cca-060a-728b-b16f-27bbad9b8831" xlink:href="coty-20260331.xsd#coty_A2023CotyRevolvingCreditFacilityDueJuly2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7573-8392-d81448fa04bc" xlink:to="loc_coty_A2023CotyRevolvingCreditFacilityDueJuly2028Member_019c6cca-060a-728b-b16f-27bbad9b8831" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7df9-b5ad-de0f93f3560b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7a1c-aa0a-6606e79ddf10" xlink:to="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7df9-b5ad-de0f93f3560b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7df9-b5ad-de0f93f3560b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7df9-b5ad-de0f93f3560b" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7df9-b5ad-de0f93f3560b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7872-9a11-92a716dd63ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7df9-b5ad-de0f93f3560b" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7872-9a11-92a716dd63ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MediumTermNotesMember_019c6cca-060a-7608-bc8c-4296db39aeda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MediumTermNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7872-9a11-92a716dd63ac" xlink:to="loc_us-gaap_MediumTermNotesMember_019c6cca-060a-7608-bc8c-4296db39aeda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_019c6cca-060a-72e1-b6ab-5a03ad0b428f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7872-9a11-92a716dd63ac" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_019c6cca-060a-72e1-b6ab-5a03ad0b428f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019c6cca-060a-7bb7-a349-626a936d77f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_ShortTermBorrowings_019c6cca-060a-7bb7-a349-626a936d77f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019c6cca-060a-7684-a39a-7237d9ad24ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019c6cca-060a-7684-a39a-7237d9ad24ca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_019c6cca-060a-7b76-814f-6019294ae89c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_FinanceLeaseLiability_019c6cca-060a-7b76-814f-6019294ae89c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019c6cca-060a-7500-9893-891574089866" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_019c6cca-060a-7500-9893-891574089866" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_019c6cca-060a-7818-969d-37440632423a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_DebtCurrent_019c6cca-060a-7818-969d-37440632423a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_LongTermDebtAndFinanceLeaseObligationsGross_019c6cca-060a-7e8f-83e6-06a39bcd273b" xlink:href="coty-20260331.xsd#coty_LongTermDebtAndFinanceLeaseObligationsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_coty_LongTermDebtAndFinanceLeaseObligationsGross_019c6cca-060a-7e8f-83e6-06a39bcd273b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019c6cca-060a-78ae-9f84-56a317b06c26" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_019c6cca-060a-78ae-9f84-56a317b06c26" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019c6cca-060a-7eab-85ec-a1e9701e2916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_019c6cca-060a-7eab-85ec-a1e9701e2916" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_019c6cca-060a-7bfd-8f40-b58b0b528c72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060a-7067-a7d9-8663c322c6f5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityStatementOfFinancialPositionExtensibleList_019c6cca-060a-7bfd-8f40-b58b0b528c72" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7e8b-8382-afc27d3cec4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7e8b-8382-afc27d3cec4a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7e8b-8382-afc27d3cec4a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7e8b-8382-afc27d3cec4a" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-7e8b-8382-afc27d3cec4a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060a-7e8b-8382-afc27d3cec4a" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_019c6cca-060a-7c66-80da-854c1f366e54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:to="loc_us-gaap_LetterOfCreditMember_019c6cca-060a-7c66-80da-854c1f366e54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BankGuaranteeMember_019c6cca-060a-744f-a9c4-0d540644c655" xlink:href="coty-20260331.xsd#coty_BankGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:to="loc_coty_BankGuaranteeMember_019c6cca-060a-744f-a9c4-0d540644c655" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BridgeLoanMember_019c6cca-060a-7c5c-9095-519fd3233aa6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BridgeLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:to="loc_us-gaap_BridgeLoanMember_019c6cca-060a-7c5c-9095-519fd3233aa6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IncurrenceIncrementalFacilitiesMember_019c6cca-060a-74e5-af08-7479a1595a02" xlink:href="coty-20260331.xsd#coty_IncurrenceIncrementalFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060a-737a-a0a2-24dc263dd06c" xlink:to="loc_coty_IncurrenceIncrementalFacilitiesMember_019c6cca-060a-74e5-af08-7479a1595a02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7b8d-bab9-b256989ab805" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7b8d-bab9-b256989ab805" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7b8d-bab9-b256989ab805_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7b8d-bab9-b256989ab805" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-7b8d-bab9-b256989ab805_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060a-7b8d-bab9-b256989ab805" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019db488-9bf9-7aeb-a533-25dc6adffc38" xlink:href="coty-20260331.xsd#coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019db488-9bf9-7aeb-a533-25dc6adffc38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019c6cca-060a-740f-aa17-29a818a40d74" xlink:href="coty-20260331.xsd#coty_A2026EuroSeniorSecuredNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019c6cca-060a-740f-aa17-29a818a40d74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026DollarSeniorSecuredNotesDueApril2026Member_019c6cca-060a-79eb-b476-73ef4c817e52" xlink:href="coty-20260331.xsd#coty_A2026DollarSeniorSecuredNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2026DollarSeniorSecuredNotesDueApril2026Member_019c6cca-060a-79eb-b476-73ef4c817e52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026DollarSeniorSecuredNotesMember_019c6cca-060a-7acb-aa5e-5fd3dc508937" xlink:href="coty-20260331.xsd#coty_A2026DollarSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2026DollarSeniorSecuredNotesMember_019c6cca-060a-7acb-aa5e-5fd3dc508937" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060a-74a9-af20-349aa6386e42" xlink:href="coty-20260331.xsd#coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060a-74a9-af20-349aa6386e42" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2030DollarSeniorSecuredNotesDueApril2030Member_019c6cca-060a-7bb5-9ed6-751795daede1" xlink:href="coty-20260331.xsd#coty_A2030DollarSeniorSecuredNotesDueApril2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2030DollarSeniorSecuredNotesDueApril2030Member_019c6cca-060a-7bb5-9ed6-751795daede1" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2028EuroSeniorSecuredNotesDueMember_019c6cca-060a-706f-8e91-84a20e9eb6b1" xlink:href="coty-20260331.xsd#coty_A2028EuroSeniorSecuredNotesDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2028EuroSeniorSecuredNotesDueMember_019c6cca-060a-706f-8e91-84a20e9eb6b1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2027EuroSeniorSecuredNotesMember_019c6cca-060a-764d-b8d2-c48ba36fc3b1" xlink:href="coty-20260331.xsd#coty_A2027EuroSeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2027EuroSeniorSecuredNotesMember_019c6cca-060a-764d-b8d2-c48ba36fc3b1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member_019c6cca-060a-7fbb-b2bb-811bb97e7f05" xlink:href="coty-20260331.xsd#coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2028EuroSeniorSecuredNotesDueSeptember2028Member_019c6cca-060a-7fbb-b2bb-811bb97e7f05" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060b-78d1-89c6-08352a304b81" xlink:href="coty-20260331.xsd#coty_A2030DollarSeniorSecuredNotesDueJuly2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060b-78d1-89c6-08352a304b81" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2018CotyTermAFacilityMember_019c6cca-060b-718d-b6cf-828d72d1e56b" xlink:href="coty-20260331.xsd#coty_A2018CotyTermAFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2018CotyTermAFacilityMember_019c6cca-060b-718d-b6cf-828d72d1e56b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2018CotyTermBFacilityMember_019c6cca-060b-7c21-80ef-1ef245d04229" xlink:href="coty-20260331.xsd#coty_A2018CotyTermBFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2018CotyTermBFacilityMember_019c6cca-060b-7c21-80ef-1ef245d04229" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2018CotyCreditAgreementMember_019c6cca-060b-717d-93ef-75d637425919" xlink:href="coty-20260331.xsd#coty_A2018CotyCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2018CotyCreditAgreementMember_019c6cca-060b-717d-93ef-75d637425919" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2023CotyRevolvingCreditFacilityMember_019c6cca-060b-7352-b57c-2041a2f66546" xlink:href="coty-20260331.xsd#coty_A2023CotyRevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060a-707d-8c5f-a7e988301669" xlink:to="loc_coty_A2023CotyRevolvingCreditFacilityMember_019c6cca-060b-7352-b57c-2041a2f66546" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7582-bfd6-bf8931558ba5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7582-bfd6-bf8931558ba5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7582-bfd6-bf8931558ba5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7582-bfd6-bf8931558ba5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7582-bfd6-bf8931558ba5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-762c-ad73-326d9e8bc3d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7582-bfd6-bf8931558ba5" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-762c-ad73-326d9e8bc3d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019c6cca-060b-7d14-8ef3-9c7ecce2dc86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-762c-ad73-326d9e8bc3d0" xlink:to="loc_us-gaap_SeniorNotesMember_019c6cca-060b-7d14-8ef3-9c7ecce2dc86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_019c6cca-060b-7c27-99db-5ffe865ba25a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-762c-ad73-326d9e8bc3d0" xlink:to="loc_us-gaap_LineOfCreditMember_019c6cca-060b-7c27-99db-5ffe865ba25a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019c6cca-060b-7b17-ad3e-1a1a603fb8b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_us-gaap_VariableRateAxis_019c6cca-060b-7b17-ad3e-1a1a603fb8b1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b17-ad3e-1a1a603fb8b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019c6cca-060b-7b17-ad3e-1a1a603fb8b1" xlink:to="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b17-ad3e-1a1a603fb8b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b4b-b5e4-cc140adfbf75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019c6cca-060b-7b17-ad3e-1a1a603fb8b1" xlink:to="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b4b-b5e4-cc140adfbf75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UsTreasuryUstInterestRateMember_019c6cca-060b-7d32-8b8c-2fa1539b53b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UsTreasuryUstInterestRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b4b-b5e4-cc140adfbf75" xlink:to="loc_us-gaap_UsTreasuryUstInterestRateMember_019c6cca-060b-7d32-8b8c-2fa1539b53b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BundRateMember_019c6cca-060b-70a5-9642-49f913a170ce" xlink:href="coty-20260331.xsd#coty_BundRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c6cca-060b-7b4b-b5e4-cc140adfbf75" xlink:to="loc_coty_BundRateMember_019c6cca-060b-70a5-9642-49f913a170ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRefinancingAxis_019c6cca-060b-7b16-bd42-7874f099e35a" xlink:href="coty-20260331.xsd#coty_DebtRefinancingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_coty_DebtRefinancingAxis_019c6cca-060b-7b16-bd42-7874f099e35a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRefinancingDomain_019c6cca-060b-7b16-bd42-7874f099e35a_default" xlink:href="coty-20260331.xsd#coty_DebtRefinancingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_coty_DebtRefinancingAxis_019c6cca-060b-7b16-bd42-7874f099e35a" xlink:to="loc_coty_DebtRefinancingDomain_019c6cca-060b-7b16-bd42-7874f099e35a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRefinancingDomain_019c6cca-060b-7603-bdd5-4f0703609d76" xlink:href="coty-20260331.xsd#coty_DebtRefinancingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_coty_DebtRefinancingAxis_019c6cca-060b-7b16-bd42-7874f099e35a" xlink:to="loc_coty_DebtRefinancingDomain_019c6cca-060b-7603-bdd5-4f0703609d76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RefinancingInDollarsAndCertainOtherCurrenciesMember_019c6cca-060b-7bb2-b34f-7f6d45f36d68" xlink:href="coty-20260331.xsd#coty_RefinancingInDollarsAndCertainOtherCurrenciesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRefinancingDomain_019c6cca-060b-7603-bdd5-4f0703609d76" xlink:to="loc_coty_RefinancingInDollarsAndCertainOtherCurrenciesMember_019c6cca-060b-7bb2-b34f-7f6d45f36d68" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RefinancingInEurosMember_019c6cca-060b-7a21-9d1e-858b03177848" xlink:href="coty-20260331.xsd#coty_RefinancingInEurosMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRefinancingDomain_019c6cca-060b-7603-bdd5-4f0703609d76" xlink:to="loc_coty_RefinancingInEurosMember_019c6cca-060b-7a21-9d1e-858b03177848" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c6cca-060b-7e80-b4a1-55e869911ee4" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_srt_RangeAxis_019c6cca-060b-7e80-b4a1-55e869911ee4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060b-7e80-b4a1-55e869911ee4_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c6cca-060b-7e80-b4a1-55e869911ee4" xlink:to="loc_srt_RangeMember_019c6cca-060b-7e80-b4a1-55e869911ee4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060b-7674-b600-1e21df1a4bf0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c6cca-060b-7e80-b4a1-55e869911ee4" xlink:to="loc_srt_RangeMember_019c6cca-060b-7674-b600-1e21df1a4bf0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c6cca-060b-73b1-949d-8848693eaa5b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060b-7674-b600-1e21df1a4bf0" xlink:to="loc_srt_MaximumMember_019c6cca-060b-73b1-949d-8848693eaa5b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c6cca-060b-7786-b378-e2f8f95024de" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060b-7674-b600-1e21df1a4bf0" xlink:to="loc_srt_MinimumMember_019c6cca-060b-7786-b378-e2f8f95024de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019db510-acea-7a53-b413-314c669b5799" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060a-7adb-9c5b-abdae023a6fe" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019db510-acea-7a53-b413-314c669b5799" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019db510-acea-7a53-b413-314c669b5799_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019db510-acea-7a53-b413-314c669b5799" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019db510-acea-7a53-b413-314c669b5799_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019db510-acea-7abf-a95a-14f169615689" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019db510-acea-7a53-b413-314c669b5799" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019db510-acea-7abf-a95a-14f169615689" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019db510-acea-7d2f-af0b-7aae461d9156" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019db510-acea-7abf-a95a-14f169615689" xlink:to="loc_us-gaap_SubsequentEventMember_019db510-acea-7d2f-af0b-7aae461d9156" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermBorrowings_019c6cca-060b-7cf8-90c6-83f632ff8bee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermBorrowings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_ShortTermBorrowings_019c6cca-060b-7cf8-90c6-83f632ff8bee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c6cca-060b-7672-99fc-3394cf009a08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_019c6cca-060b-7672-99fc-3394cf009a08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_019c6cca-060b-7f23-b55c-f0184aa42140" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_019c6cca-060b-7f23-b55c-f0184aa42140" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c6cca-060b-7315-bc7d-a28985047d2a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c6cca-060b-7315-bc7d-a28985047d2a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_019c6cca-060b-71f2-a873-19c13d4f7d0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_019c6cca-060b-71f2-a873-19c13d4f7d0b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019db48f-dea6-7747-a42f-a0cd188a91f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019db48f-dea6-7747-a42f-a0cd188a91f6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_019c6cca-060b-79d9-aaab-d0438e0bfe2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_019c6cca-060b-79d9-aaab-d0438e0bfe2b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_019c6cca-060b-7a7d-9946-00e0e5c64768" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_LineOfCredit_019c6cca-060b-7a7d-9946-00e0e5c64768" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentEarlyRedemptionPremiumPercentOfOutstandingPrincipalAmount_019c6cca-060b-767c-bf56-6f5426deb86e" xlink:href="coty-20260331.xsd#coty_DebtInstrumentEarlyRedemptionPremiumPercentOfOutstandingPrincipalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentEarlyRedemptionPremiumPercentOfOutstandingPrincipalAmount_019c6cca-060b-767c-bf56-6f5426deb86e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c6cca-060b-7aa3-ac3b-f18fc1ade42b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c6cca-060b-7aa3-ac3b-f18fc1ade42b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentBaseRedemptionPricePercentage_019c6cca-060b-74b4-8e94-a3ac946a14ab" xlink:href="coty-20260331.xsd#coty_DebtInstrumentBaseRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentBaseRedemptionPricePercentage_019c6cca-060b-74b4-8e94-a3ac946a14ab" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c6cca-060b-7d08-bb5b-eda216b66b0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_019c6cca-060b-7d08-bb5b-eda216b66b0c" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCreditSpreadAdjustmentPercentage_019c6cca-060b-75bd-9c37-751eb3cf9a70" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCreditSpreadAdjustmentPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentCreditSpreadAdjustmentPercentage_019c6cca-060b-75bd-9c37-751eb3cf9a70" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatio_019c6cca-060b-7bf1-a7d7-f3d64a24433b" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCovenantTotalNetLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatio_019c6cca-060b-7bf1-a7d7-f3d64a24433b" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_019c6cca-060b-7e29-b811-d9bbef21ed66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_019c6cca-060b-7e29-b811-d9bbef21ed66" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentOriginalDebtDiscountCapitalized_019c6cca-060b-7ce1-bfb1-2043bcb8a134" xlink:href="coty-20260331.xsd#coty_DebtInstrumentOriginalDebtDiscountCapitalized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentOriginalDebtDiscountCapitalized_019c6cca-060b-7ce1-bfb1-2043bcb8a134" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuarters_019c6cca-060b-7155-a309-feba0142217f" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuarters"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuarters_019c6cca-060b-7155-a309-feba0142217f" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisition_019c6cca-060b-7ffd-8f09-044dd44ebb8a" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisition_019c6cca-060b-7ffd-8f09-044dd44ebb8a" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuartersNoGreaterThanTheMaximumTotalNetLeverageRatio_019c6cca-060b-7948-9243-373a98d32b60" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuartersNoGreaterThanTheMaximumTotalNetLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7ee4-b3e2-0096e75ed705" xlink:to="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatioMaterialAcquisitionNumberOfFiscalQuartersNoGreaterThanTheMaximumTotalNetLeverageRatio_019c6cca-060b-7948-9243-373a98d32b60" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTScheduleofdebtinstrumentredemptionDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTScheduleofdebtinstrumentredemptionDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTScheduleofdebtinstrumentredemptionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7cc9-afdc-fdc964bc5502" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-747f-bea6-ffe79fa61872" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7cc9-afdc-fdc964bc5502" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-747f-bea6-ffe79fa61872" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019c6cca-060b-7f5b-aecc-b972986248b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-747f-bea6-ffe79fa61872" xlink:to="loc_us-gaap_DebtInstrumentAxis_019c6cca-060b-7f5b-aecc-b972986248b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-7f5b-aecc-b972986248b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060b-7f5b-aecc-b972986248b4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-7f5b-aecc-b972986248b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019c6cca-060b-7f5b-aecc-b972986248b4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2027EuroSeniorSecuredNotesDueMay2027Member_019c6cca-060b-76f7-8d06-8f6fd701b2d5" xlink:href="coty-20260331.xsd#coty_A2027EuroSeniorSecuredNotesDueMay2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:to="loc_coty_A2027EuroSeniorSecuredNotesDueMay2027Member_019c6cca-060b-76f7-8d06-8f6fd701b2d5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2027EuroSeniorSecuredNotesDueNovember2027Member_019c6cca-060b-7d4e-a170-ba5de5ed679a" xlink:href="coty-20260331.xsd#coty_A2027EuroSeniorSecuredNotesDueNovember2027Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:to="loc_coty_A2027EuroSeniorSecuredNotesDueNovember2027Member_019c6cca-060b-7d4e-a170-ba5de5ed679a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060b-7f6c-bb4a-5c3844ed38f0" xlink:href="coty-20260331.xsd#coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:to="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-060b-7f6c-bb4a-5c3844ed38f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060b-7088-bc9c-539ae115002e" xlink:href="coty-20260331.xsd#coty_A2030DollarSeniorSecuredNotesDueJuly2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:to="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-060b-7088-bc9c-539ae115002e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019c6cca-060b-7d79-a11c-95589214fa5c" xlink:href="coty-20260331.xsd#coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019c6cca-060b-767f-9f56-982fee5b7d05" xlink:to="loc_coty_A2031DollarSeniorSecuredNotesDueJanuary2031Member_019c6cca-060b-7d79-a11c-95589214fa5c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-74f1-92c9-8f8f7448eeda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-747f-bea6-ffe79fa61872" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-74f1-92c9-8f8f7448eeda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-74f1-92c9-8f8f7448eeda_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-74f1-92c9-8f8f7448eeda" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-74f1-92c9-8f8f7448eeda_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7e85-af2e-60e204bd22fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-74f1-92c9-8f8f7448eeda" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7e85-af2e-60e204bd22fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentRedemptionPeriodSixMember_019c6cca-060b-7a26-a9ae-905ec2bf5bfc" xlink:href="coty-20260331.xsd#coty_DebtInstrumentRedemptionPeriodSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7e85-af2e-60e204bd22fa" xlink:to="loc_coty_DebtInstrumentRedemptionPeriodSixMember_019c6cca-060b-7a26-a9ae-905ec2bf5bfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentRedemptionPeriodYearSevenMember_019c6cca-060b-78df-85fe-3936ebf2288f" xlink:href="coty-20260331.xsd#coty_DebtInstrumentRedemptionPeriodYearSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7e85-af2e-60e204bd22fa" xlink:to="loc_coty_DebtInstrumentRedemptionPeriodYearSevenMember_019c6cca-060b-78df-85fe-3936ebf2288f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentRedemptionPeriodAfterYearSevenMember_019c6cca-060b-7312-ade0-eaf20cd5fd9d" xlink:href="coty-20260331.xsd#coty_DebtInstrumentRedemptionPeriodAfterYearSevenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7e85-af2e-60e204bd22fa" xlink:to="loc_coty_DebtInstrumentRedemptionPeriodAfterYearSevenMember_019c6cca-060b-7312-ade0-eaf20cd5fd9d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7cd8-b2ae-b5c522daa9ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-747f-bea6-ffe79fa61872" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7cd8-b2ae-b5c522daa9ff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7cd8-b2ae-b5c522daa9ff_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7cd8-b2ae-b5c522daa9ff" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7cd8-b2ae-b5c522daa9ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7b2c-9a55-f60306708993" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-7cd8-b2ae-b5c522daa9ff" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7b2c-9a55-f60306708993" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019c6cca-060b-7695-a0d3-9d4c8af832fa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7b2c-9a55-f60306708993" xlink:to="loc_us-gaap_SeniorNotesMember_019c6cca-060b-7695-a0d3-9d4c8af832fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019c6cca-060b-7721-85a9-117ef7f5e25c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7cc9-afdc-fdc964bc5502" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_019c6cca-060b-7721-85a9-117ef7f5e25c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTScheduleofpricingtiersDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTScheduleofpricingtiersDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTScheduleofpricingtiersDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7f95-aaef-5415d7bc2d7d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7f95-aaef-5415d7bc2d7d" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_019c6cca-060b-7e26-9ad6-0d98238a4c00" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:to="loc_srt_RangeAxis_019c6cca-060b-7e26-9ad6-0d98238a4c00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060b-7e26-9ad6-0d98238a4c00_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_019c6cca-060b-7e26-9ad6-0d98238a4c00" xlink:to="loc_srt_RangeMember_019c6cca-060b-7e26-9ad6-0d98238a4c00_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_019c6cca-060b-74af-ab19-634520d3d414" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_019c6cca-060b-7e26-9ad6-0d98238a4c00" xlink:to="loc_srt_RangeMember_019c6cca-060b-74af-ab19-634520d3d414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_019c6cca-060b-73a8-b8ce-64d99bd95b3b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060b-74af-ab19-634520d3d414" xlink:to="loc_srt_MinimumMember_019c6cca-060b-73a8-b8ce-64d99bd95b3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_019c6cca-060b-7bc9-abd6-e3e851fd254a" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_019c6cca-060b-74af-ab19-634520d3d414" xlink:to="loc_srt_MaximumMember_019c6cca-060b-7bc9-abd6-e3e851fd254a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NetLeverageRatioPricingTierAxis_019c6cca-060b-77aa-bfa5-1132a80a66f8" xlink:href="coty-20260331.xsd#coty_NetLeverageRatioPricingTierAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:to="loc_coty_NetLeverageRatioPricingTierAxis_019c6cca-060b-77aa-bfa5-1132a80a66f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-77aa-bfa5-1132a80a66f8_default" xlink:href="coty-20260331.xsd#coty_NetLeverageRatioPricingTierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_coty_NetLeverageRatioPricingTierAxis_019c6cca-060b-77aa-bfa5-1132a80a66f8" xlink:to="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-77aa-bfa5-1132a80a66f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:href="coty-20260331.xsd#coty_NetLeverageRatioPricingTierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_coty_NetLeverageRatioPricingTierAxis_019c6cca-060b-77aa-bfa5-1132a80a66f8" xlink:to="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierOneMember_019c6cca-060b-73ea-9926-d01e2b29983b" xlink:href="coty-20260331.xsd#coty_PricingTierOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierOneMember_019c6cca-060b-73ea-9926-d01e2b29983b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierTwoMember_019c6cca-060b-7eaa-9d7c-a4bf5d2a7139" xlink:href="coty-20260331.xsd#coty_PricingTierTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierTwoMember_019c6cca-060b-7eaa-9d7c-a4bf5d2a7139" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierThreeMember_019c6cca-060b-7ff5-9c69-786054737b19" xlink:href="coty-20260331.xsd#coty_PricingTierThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierThreeMember_019c6cca-060b-7ff5-9c69-786054737b19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierFourMember_019c6cca-060b-73f0-819b-e2d1ba1d6898" xlink:href="coty-20260331.xsd#coty_PricingTierFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierFourMember_019c6cca-060b-73f0-819b-e2d1ba1d6898" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierFiveMember_019c6cca-060b-78ab-a220-ede31d6e7274" xlink:href="coty-20260331.xsd#coty_PricingTierFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierFiveMember_019c6cca-060b-78ab-a220-ede31d6e7274" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierSixMember_019c6cca-060b-71bd-9e74-789bc191cc01" xlink:href="coty-20260331.xsd#coty_PricingTierSixMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_NetLeverageRatioPricingTierDomain_019c6cca-060b-7d67-ad68-c2e33258f7e4" xlink:to="loc_coty_PricingTierSixMember_019c6cca-060b-71bd-9e74-789bc191cc01" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRatingPricingTierAxis_019c6cca-060b-73c3-8d57-1c6689b041f7" xlink:href="coty-20260331.xsd#coty_DebtRatingPricingTierAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:to="loc_coty_DebtRatingPricingTierAxis_019c6cca-060b-73c3-8d57-1c6689b041f7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-73c3-8d57-1c6689b041f7_default" xlink:href="coty-20260331.xsd#coty_DebtRatingPricingTierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_coty_DebtRatingPricingTierAxis_019c6cca-060b-73c3-8d57-1c6689b041f7" xlink:to="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-73c3-8d57-1c6689b041f7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:href="coty-20260331.xsd#coty_DebtRatingPricingTierDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_coty_DebtRatingPricingTierAxis_019c6cca-060b-73c3-8d57-1c6689b041f7" xlink:to="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierFiveMember_019c6cca-060b-7f63-bd8b-7abae4861b1d" xlink:href="coty-20260331.xsd#coty_PricingTierFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:to="loc_coty_PricingTierFiveMember_019c6cca-060b-7f63-bd8b-7abae4861b1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierFourMember_019c6cca-060b-7531-a35c-e86a0f0b13cf" xlink:href="coty-20260331.xsd#coty_PricingTierFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:to="loc_coty_PricingTierFourMember_019c6cca-060b-7531-a35c-e86a0f0b13cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierThreeMember_019c6cca-060b-7354-974d-b8709dda0e36" xlink:href="coty-20260331.xsd#coty_PricingTierThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:to="loc_coty_PricingTierThreeMember_019c6cca-060b-7354-974d-b8709dda0e36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierTwoMember_019c6cca-060b-7925-89f6-357be8f4bf55" xlink:href="coty-20260331.xsd#coty_PricingTierTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:to="loc_coty_PricingTierTwoMember_019c6cca-060b-7925-89f6-357be8f4bf55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierOneMember_019c6cca-060b-770f-b75d-1fe58a375c66" xlink:href="coty-20260331.xsd#coty_PricingTierOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_DebtRatingPricingTierDomain_019c6cca-060b-76fc-b03b-497f27f83e3d" xlink:to="loc_coty_PricingTierOneMember_019c6cca-060b-770f-b75d-1fe58a375c66" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7d1d-a631-bb8e725555c3" xlink:to="loc_us-gaap_VariableRateAxis_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7" xlink:to="loc_us-gaap_VariableRateDomain_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_019c6cca-060b-72b6-b8db-87beae5f5b03" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_019c6cca-060b-7c3c-8b81-2ab8f7f03bf7" xlink:to="loc_us-gaap_VariableRateDomain_019c6cca-060b-72b6-b8db-87beae5f5b03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019c6cca-060b-71a5-b734-9dd1785a96f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c6cca-060b-72b6-b8db-87beae5f5b03" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrMember_019c6cca-060b-71a5-b734-9dd1785a96f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_019c6cca-060b-77bf-ae90-51add84e935a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_019c6cca-060b-72b6-b8db-87beae5f5b03" xlink:to="loc_us-gaap_BaseRateMember_019c6cca-060b-77bf-ae90-51add84e935a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PricingTierNetLeverageRatio_019c6cca-060b-7ba8-931e-fe6ab0db5f0f" xlink:href="coty-20260331.xsd#coty_PricingTierNetLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7f95-aaef-5415d7bc2d7d" xlink:to="loc_coty_PricingTierNetLeverageRatio_019c6cca-060b-7ba8-931e-fe6ab0db5f0f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c6cca-060b-719c-81a2-ccec206442a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7f95-aaef-5415d7bc2d7d" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_019c6cca-060b-719c-81a2-ccec206442a1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTScheduleoffairvalueofdebtDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTScheduleoffairvalueofdebtDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTScheduleoffairvalueofdebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7a4b-9c36-406de7f69db6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7243-983f-6d0226100811" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7a4b-9c36-406de7f69db6" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7243-983f-6d0226100811" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-75e2-8cb8-3997d6b48fee" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7243-983f-6d0226100811" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-75e2-8cb8-3997d6b48fee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-75e2-8cb8-3997d6b48fee_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-75e2-8cb8-3997d6b48fee" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-75e2-8cb8-3997d6b48fee_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7941-b6b6-7c69b939f749" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-060b-75e2-8cb8-3997d6b48fee" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7941-b6b6-7c69b939f749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_019c6cca-060b-7907-ba64-57a21de70c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-060b-7941-b6b6-7c69b939f749" xlink:to="loc_us-gaap_SecuredDebtMember_019c6cca-060b-7907-ba64-57a21de70c7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_019c6cca-060b-712a-ab0a-f13143a0a1da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7243-983f-6d0226100811" xlink:to="loc_us-gaap_CreditFacilityAxis_019c6cca-060b-712a-ab0a-f13143a0a1da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060b-712a-ab0a-f13143a0a1da_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060b-712a-ab0a-f13143a0a1da" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060b-712a-ab0a-f13143a0a1da_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_019c6cca-060b-7a3b-b3e4-cb25a3ac487b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_019c6cca-060b-712a-ab0a-f13143a0a1da" xlink:to="loc_us-gaap_CreditFacilityDomain_019c6cca-060b-7a3b-b3e4-cb25a3ac487b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2018CotyCreditAgreementMember_019c6cca-060b-7fe0-b0e6-a1d4a3b3b944" xlink:href="coty-20260331.xsd#coty_A2018CotyCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_019c6cca-060b-7a3b-b3e4-cb25a3ac487b" xlink:to="loc_coty_A2018CotyCreditAgreementMember_019c6cca-060b-7fe0-b0e6-a1d4a3b3b944" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_019c6cca-060b-7749-ac30-bb1bf76b6a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7243-983f-6d0226100811" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_019c6cca-060b-7749-ac30-bb1bf76b6a3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7749-ac30-bb1bf76b6a3b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019c6cca-060b-7749-ac30-bb1bf76b6a3b" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7749-ac30-bb1bf76b6a3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019c6cca-060b-7fdc-9f47-340affb191f4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_019c6cca-060b-7749-ac30-bb1bf76b6a3b" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019c6cca-060b-7fdc-9f47-340affb191f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7538-a168-f10d30f79890" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_019c6cca-060b-7fdc-9f47-340affb191f4" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7538-a168-f10d30f79890" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019c6cca-060b-7a3c-ba2e-176c9ec46565" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7538-a168-f10d30f79890" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_019c6cca-060b-7a3c-ba2e-176c9ec46565" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019c6cca-060b-77c3-89f5-b7c5babda8f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_019c6cca-060b-7538-a168-f10d30f79890" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_019c6cca-060b-77c3-89f5-b7c5babda8f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_019c6cca-060b-73a0-a5b7-a585d7fb231f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7a4b-9c36-406de7f69db6" xlink:to="loc_us-gaap_DebtInstrumentFairValue_019c6cca-060b-73a0-a5b7-a585d7fb231f" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DEBTScheduleoftotalnetleverageratioDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DEBTScheduleoftotalnetleverageratioDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DEBTScheduleoftotalnetleverageratioDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7176-8f42-1aa5f0d3eb1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7563-8806-d63847c3613c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7176-8f42-1aa5f0d3eb1d" xlink:to="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7563-8806-d63847c3613c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-765f-b957-cab44aac0fb4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_019c6cca-060b-7563-8806-d63847c3613c" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-765f-b957-cab44aac0fb4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-765f-b957-cab44aac0fb4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-765f-b957-cab44aac0fb4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-765f-b957-cab44aac0fb4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7590-af7b-3e405948bd0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_019c6cca-060b-765f-b957-cab44aac0fb4" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7590-af7b-3e405948bd0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PeriodEndingMarch312026ThroughJuly112028Member_019c6cca-060b-7413-bcb1-b74533ed7ec5" xlink:href="coty-20260331.xsd#coty_PeriodEndingMarch312026ThroughJuly112028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_019c6cca-060b-7590-af7b-3e405948bd0e" xlink:to="loc_coty_PeriodEndingMarch312026ThroughJuly112028Member_019c6cca-060b-7413-bcb1-b74533ed7ec5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatio_019c6cca-060b-7098-9aa6-dba7ea5c7ca2" xlink:href="coty-20260331.xsd#coty_DebtInstrumentCovenantTotalNetLeverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_019c6cca-060b-7176-8f42-1aa5f0d3eb1d" xlink:to="loc_coty_DebtInstrumentCovenantTotalNetLeverageRatio_019c6cca-060b-7098-9aa6-dba7ea5c7ca2" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EMPLOYEEBENEFITPLANSScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EMPLOYEEBENEFITPLANSScheduleofComponentsofNetPeriodicBenefitCostDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EMPLOYEEBENEFITPLANSScheduleofComponentsofNetPeriodicBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019c6cca-06c5-7d1d-acdb-2c228eca08f3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019c6cca-06c5-7d1d-acdb-2c228eca08f3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationAxis_019c6cca-06c5-7f9b-9612-c1cc665d7aef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019c6cca-06c5-7d1d-acdb-2c228eca08f3" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationAxis_019c6cca-06c5-7f9b-9612-c1cc665d7aef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-7f9b-9612-c1cc665d7aef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019c6cca-06c5-7f9b-9612-c1cc665d7aef" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-7f9b-9612-c1cc665d7aef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-732b-b2fd-30eb3d298c6e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanSponsorLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationAxis_019c6cca-06c5-7f9b-9612-c1cc665d7aef" xlink:to="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-732b-b2fd-30eb3d298c6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticPlanMember_019c6cca-06c5-7ae4-b13a-c4d14681772f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DomesticPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-732b-b2fd-30eb3d298c6e" xlink:to="loc_us-gaap_DomesticPlanMember_019c6cca-06c5-7ae4-b13a-c4d14681772f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_019c6cca-06c5-7bf9-8622-389dc7a554e3" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DomesticPlanMember_019c6cca-06c5-7ae4-b13a-c4d14681772f" xlink:to="loc_country_US_019c6cca-06c5-7bf9-8622-389dc7a554e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignPlanMember_019c6cca-06c5-799e-aab5-c11bd28bda8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanSponsorLocationDomain_019c6cca-06c5-732b-b2fd-30eb3d298c6e" xlink:to="loc_us-gaap_ForeignPlanMember_019c6cca-06c5-799e-aab5-c11bd28bda8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_019c6cca-06c5-7f17-b642-ee17f5b45e41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_019c6cca-06c5-7d1d-acdb-2c228eca08f3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_019c6cca-06c5-7f17-b642-ee17f5b45e41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7f17-b642-ee17f5b45e41_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019c6cca-06c5-7f17-b642-ee17f5b45e41" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7f17-b642-ee17f5b45e41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7a06-a6ca-736894c9f65f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_019c6cca-06c5-7f17-b642-ee17f5b45e41" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7a06-a6ca-736894c9f65f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_019c6cca-06c5-7fcc-ae91-09dc77c4b0ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7a06-a6ca-736894c9f65f" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_019c6cca-06c5-7fcc-ae91-09dc77c4b0ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PostemploymentRetirementBenefitsMember_019c6cca-06c5-7073-b41a-81b348e96b9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PostemploymentRetirementBenefitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_019c6cca-06c5-7a06-a6ca-736894c9f65f" xlink:to="loc_us-gaap_PostemploymentRetirementBenefitsMember_019c6cca-06c5-7073-b41a-81b348e96b9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019c6cca-06c5-7ea7-8018-9b68c99f1e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019c6cca-06c5-7ea7-8018-9b68c99f1e4b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019c6cca-06c5-760b-a89b-88d44b27ddf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019c6cca-06c5-760b-a89b-88d44b27ddf8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019c6cca-06c5-7e58-a00f-5983122b5514" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019c6cca-06c5-7e58-a00f-5983122b5514" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019c6cca-06c5-78c5-a514-67b0a794d834" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_019c6cca-06c5-78c5-a514-67b0a794d834" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019c6cca-06c5-7f1c-a375-96053fd3795a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_019c6cca-06c5-76fb-ad88-3d8efaf52980" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019c6cca-06c5-7f1c-a375-96053fd3795a" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DERIVATIVEINSTRUMENTSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DERIVATIVEINSTRUMENTSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-754f-8b7d-467a9d1e5376" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-754f-8b7d-467a9d1e5376" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-754f-8b7d-467a9d1e5376_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-754f-8b7d-467a9d1e5376" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-754f-8b7d-467a9d1e5376_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-754f-8b7d-467a9d1e5376" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7470-8ec6-d030cba056b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7470-8ec6-d030cba056b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_019c6cca-06c5-7d9c-9999-04e3fa6f8f30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_019c6cca-06c5-7d9c-9999-04e3fa6f8f30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-06c5-7c1d-bd3d-4e3de80e7449" xlink:href="coty-20260331.xsd#coty_A2030DollarSeniorSecuredNotesDueJuly2030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:to="loc_coty_A2030DollarSeniorSecuredNotesDueJuly2030Member_019c6cca-06c5-7c1d-bd3d-4e3de80e7449" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-06c5-7fa6-9cd9-835158a66194" xlink:href="coty-20260331.xsd#coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7471-88f6-54bc78e5aaf7" xlink:to="loc_coty_A2029DollarSeniorSecuredNotesDueJanuary2029Member_019c6cca-06c5-7fa6-9cd9-835158a66194" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c6cca-06c5-70dc-9d3f-d29f993867a1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c6cca-06c5-70dc-9d3f-d29f993867a1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019c6cca-06c5-70dc-9d3f-d29f993867a1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c6cca-06c5-70dc-9d3f-d29f993867a1" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019c6cca-06c5-70dc-9d3f-d29f993867a1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_019c6cca-06c5-78f9-bbf2-23c01df3147f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingRelationshipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_019c6cca-06c5-70dc-9d3f-d29f993867a1" xlink:to="loc_us-gaap_HedgingRelationshipDomain_019c6cca-06c5-78f9-bbf2-23c01df3147f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_019c6cca-06c5-71ff-8139-5af0ef6152f9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentHedgingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_019c6cca-06c5-78f9-bbf2-23c01df3147f" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_019c6cca-06c5-71ff-8139-5af0ef6152f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-06c5-795a-914a-f99a51c7c879" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-06c5-795a-914a-f99a51c7c879" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-06c5-795a-914a-f99a51c7c879_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-06c5-795a-914a-f99a51c7c879" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-06c5-795a-914a-f99a51c7c879_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-06c5-7f5d-afcf-48fabe54e81e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019c6cca-06c5-795a-914a-f99a51c7c879" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-06c5-7f5d-afcf-48fabe54e81e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019c6cca-06c5-702c-ad0e-ac52bedc1737" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019c6cca-06c5-7f5d-afcf-48fabe54e81e" xlink:to="loc_us-gaap_SeniorNotesMember_019c6cca-06c5-702c-ad0e-ac52bedc1737" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CurrencyAxis_019c6cca-06c5-78de-aca2-16a89bf02514" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CurrencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresTable_019c6cca-06c5-71a2-bfc3-12ca2637dd23" xlink:to="loc_srt_CurrencyAxis_019c6cca-06c5-78de-aca2-16a89bf02514" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c6cca-06c5-78de-aca2-16a89bf02514_default" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CurrencyAxis_019c6cca-06c5-78de-aca2-16a89bf02514" xlink:to="loc_currency_AllCurrenciesDomain_019c6cca-06c5-78de-aca2-16a89bf02514_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_AllCurrenciesDomain_019c6cca-06c5-79ab-962b-869eedfb16c5" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_AllCurrenciesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CurrencyAxis_019c6cca-06c5-78de-aca2-16a89bf02514" xlink:to="loc_currency_AllCurrenciesDomain_019c6cca-06c5-79ab-962b-869eedfb16c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_currency_CHF_019c6cca-06c5-7755-b45c-d4330dd04f73" xlink:href="https://xbrl.sec.gov/currency/2025/currency-2025.xsd#currency_CHF"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_019c6cca-06c5-79ab-962b-869eedfb16c5" xlink:to="loc_currency_CHF_019c6cca-06c5-7755-b45c-d4330dd04f73" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019c6cca-06c5-71d0-890d-617c9e0d0e0d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019c6cca-06c5-71d0-890d-617c9e0d0e0d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c6cca-06c5-7b68-87cd-4a06eac0386e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_019c6cca-06c5-7b68-87cd-4a06eac0386e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditDerivativeMaximumExposureUndiscounted_019c6cca-06c5-7377-b35f-01ab5c300fec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditDerivativeMaximumExposureUndiscounted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_CreditDerivativeMaximumExposureUndiscounted_019c6cca-06c5-7377-b35f-01ab5c300fec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c6cca-06c5-73b5-bbc0-4201121fd136" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c6cca-06c5-73b5-bbc0-4201121fd136" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DerivativeForwardRepurchaseContractsTerm_019c6cca-06c5-7bc4-be52-af94f6a16aa8" xlink:href="coty-20260331.xsd#coty_DerivativeForwardRepurchaseContractsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_coty_DerivativeForwardRepurchaseContractsTerm_019c6cca-06c5-7bc4-be52-af94f6a16aa8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_019c6cca-06c5-7576-825b-1f40a4382d3a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax_019c6cca-06c5-7576-825b-1f40a4382d3a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_019c6cca-06c5-7ade-90a8-18c612c9ea4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosuresLineItems_019c6cca-06c5-7243-b80e-206ed854ceb9" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_019c6cca-06c5-7ade-90a8-18c612c9ea4e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesrecognizedinothercomprehensiveincomelossDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesrecognizedinothercomprehensiveincomelossDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesrecognizedinothercomprehensiveincomelossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-7673-90bf-8501e7189552" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019c6cca-06c5-7563-a867-6bbe98f3571e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-7673-90bf-8501e7189552" xlink:to="loc_us-gaap_DerivativeTable_019c6cca-06c5-7563-a867-6bbe98f3571e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7f45-89d8-6842300bccd1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019c6cca-06c5-7563-a867-6bbe98f3571e" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7f45-89d8-6842300bccd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7f45-89d8-6842300bccd1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7f45-89d8-6842300bccd1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7f45-89d8-6842300bccd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7079-831c-ebb2476d2759" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7f45-89d8-6842300bccd1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7079-831c-ebb2476d2759" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-754b-a38f-3ccfe211c86d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7079-831c-ebb2476d2759" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-754b-a38f-3ccfe211c86d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CrossCurrencyInterestRateContractMember_019c6cca-06c5-7c28-a833-e6bc51aade4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CrossCurrencyInterestRateContractMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7079-831c-ebb2476d2759" xlink:to="loc_us-gaap_CrossCurrencyInterestRateContractMember_019c6cca-06c5-7c28-a833-e6bc51aade4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019c6cca-06c5-750b-a2cb-48a0b08e9688" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-7673-90bf-8501e7189552" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax_019c6cca-06c5-750b-a2cb-48a0b08e9688" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_019c6cca-06c5-7f7e-8262-4177d846038d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-7673-90bf-8501e7189552" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_019c6cca-06c5-7f7e-8262-4177d846038d" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesreclassifiedfromAOCILDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesreclassifiedfromAOCILDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofamountofgainsandlossesreclassifiedfromAOCILDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019c6cca-06c5-7170-b288-0ed03b4e8a16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019c6cca-06c5-7150-8581-b008a38186c2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019c6cca-06c5-7170-b288-0ed03b4e8a16" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019c6cca-06c5-7150-8581-b008a38186c2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-7448-86ad-91e0ac7e8ac2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019c6cca-06c5-7150-8581-b008a38186c2" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-7448-86ad-91e0ac7e8ac2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7448-86ad-91e0ac7e8ac2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-7448-86ad-91e0ac7e8ac2" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7448-86ad-91e0ac7e8ac2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7ab7-8a49-4232a8818b39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-7448-86ad-91e0ac7e8ac2" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7ab7-8a49-4232a8818b39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfSalesMember_019c6cca-06c5-7097-95d3-059b12f11a66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7ab7-8a49-4232a8818b39" xlink:to="loc_us-gaap_CostOfSalesMember_019c6cca-06c5-7097-95d3-059b12f11a66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_019c6cca-06c5-70fd-b391-f793ec42801b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7ab7-8a49-4232a8818b39" xlink:to="loc_us-gaap_InterestExpenseMember_019c6cca-06c5-70fd-b391-f793ec42801b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-703c-803e-3907228598d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_019c6cca-06c5-7150-8581-b008a38186c2" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-703c-803e-3907228598d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-703c-803e-3907228598d7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-703c-803e-3907228598d7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-703c-803e-3907228598d7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-71c4-80ec-32032793a905" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-703c-803e-3907228598d7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-71c4-80ec-32032793a905" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7e5c-9d45-1eaf1830b073" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-71c4-80ec-32032793a905" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7e5c-9d45-1eaf1830b073" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_019c6cca-06c5-7e9e-8479-12ee1f131590" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-71c4-80ec-32032793a905" xlink:to="loc_us-gaap_InterestRateSwapMember_019c6cca-06c5-7e9e-8479-12ee1f131590" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019c6cca-06c5-768d-9d4e-5a3b524bb2ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeOnDerivativesLineItems_019c6cca-06c5-7170-b288-0ed03b4e8a16" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax_019c6cca-06c5-768d-9d4e-5a3b524bb2ac" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofderivativesnotdesignatedashedgingDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#DERIVATIVEINSTRUMENTSScheduleofderivativesnotdesignatedashedgingDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/DERIVATIVEINSTRUMENTSScheduleofderivativesnotdesignatedashedgingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-769d-bdfa-3e99b5045b39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_019c6cca-06c5-7f21-88db-9a7fa01a0752" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-769d-bdfa-3e99b5045b39" xlink:to="loc_us-gaap_DerivativeTable_019c6cca-06c5-7f21-88db-9a7fa01a0752" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7345-8bf0-1471d5e908b1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019c6cca-06c5-7f21-88db-9a7fa01a0752" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7345-8bf0-1471d5e908b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7345-8bf0-1471d5e908b1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7345-8bf0-1471d5e908b1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7345-8bf0-1471d5e908b1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7114-a3d6-796e3a1ce85e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_019c6cca-06c5-7345-8bf0-1471d5e908b1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7114-a3d6-796e3a1ce85e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7a2d-ae49-553e091363de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_019c6cca-06c5-7114-a3d6-796e3a1ce85e" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_019c6cca-06c5-7a2d-ae49-553e091363de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-79ad-841e-48dd7e9a500f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_019c6cca-06c5-7f21-88db-9a7fa01a0752" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-79ad-841e-48dd7e9a500f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-79ad-841e-48dd7e9a500f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-79ad-841e-48dd7e9a500f" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-79ad-841e-48dd7e9a500f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7c56-9d7e-c39f6ada8b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_019c6cca-06c5-79ad-841e-48dd7e9a500f" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7c56-9d7e-c39f6ada8b9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019c6cca-06c5-7da9-a3ef-4c2b54a7247a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7c56-9d7e-c39f6ada8b9c" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_019c6cca-06c5-7da9-a3ef-4c2b54a7247a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseMember_019c6cca-06c5-79b5-8d9e-bc3c24fa9dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7c56-9d7e-c39f6ada8b9c" xlink:to="loc_us-gaap_InterestExpenseMember_019c6cca-06c5-79b5-8d9e-bc3c24fa9dfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseMember_019c6cca-06c5-77b5-8a58-634cbb0694af" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_019c6cca-06c5-7c56-9d7e-c39f6ada8b9c" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpenseMember_019c6cca-06c5-77b5-8a58-634cbb0694af" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019c6cca-06c5-74ea-9794-d4c279dce5c0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_019c6cca-06c5-769d-bdfa-3e99b5045b39" xlink:to="loc_us-gaap_DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet_019c6cca-06c5-74ea-9794-d4c279dce5c0" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYANDCONVERTIBLEPREFERREDSTOCKNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYANDCONVERTIBLEPREFERREDSTOCKNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYANDCONVERTIBLEPREFERREDSTOCKNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7fa1-abc1-ce3affd24bb6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7fa1-abc1-ce3affd24bb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7fa1-abc1-ce3affd24bb6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7fa1-abc1-ce3affd24bb6" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7fa1-abc1-ce3affd24bb6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-729d-bb8f-5e3657060e6a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7fa1-abc1-ce3affd24bb6" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-729d-bb8f-5e3657060e6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c6cca-06c5-776d-a8e5-6ed9b8fb2163" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-729d-bb8f-5e3657060e6a" xlink:to="loc_us-gaap_CommonClassAMember_019c6cca-06c5-776d-a8e5-6ed9b8fb2163" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesAPreferredStockMember_019c6cca-06c5-7707-9f33-7ac400f7062a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesAPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-729d-bb8f-5e3657060e6a" xlink:to="loc_us-gaap_SeriesAPreferredStockMember_019c6cca-06c5-7707-9f33-7ac400f7062a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesBPreferredStockMember_019c6cca-06c5-730b-ad2f-85f2d24c1960" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesBPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-729d-bb8f-5e3657060e6a" xlink:to="loc_us-gaap_SeriesBPreferredStockMember_019c6cca-06c5-730b-ad2f-85f2d24c1960" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019c6cca-06c5-7222-beb0-7b252940d131" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_srt_OwnershipAxis_019c6cca-06c5-7222-beb0-7b252940d131" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c6cca-06c5-7222-beb0-7b252940d131_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019c6cca-06c5-7222-beb0-7b252940d131" xlink:to="loc_srt_OwnershipDomain_019c6cca-06c5-7222-beb0-7b252940d131_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c6cca-06c5-7e04-8d12-b17894d15e3b" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019c6cca-06c5-7222-beb0-7b252940d131" xlink:to="loc_srt_OwnershipDomain_019c6cca-06c5-7e04-8d12-b17894d15e3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_JABBeautyBVMember_019c6cca-06c5-7043-9e97-1953c9ef51e4" xlink:href="coty-20260331.xsd#coty_JABBeautyBVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019c6cca-06c5-7e04-8d12-b17894d15e3b" xlink:to="loc_coty_JABBeautyBVMember_019c6cca-06c5-7043-9e97-1953c9ef51e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8" xlink:to="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7fab-b2b9-e814001cf7a3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-7e9e-baa5-7bfa3faf17f8" xlink:to="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7fab-b2b9-e814001cf7a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_JABBeautyBVMember_019c6cca-06c5-7d4a-b057-ca7ef87de0a9" xlink:href="coty-20260331.xsd#coty_JABBeautyBVMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7fab-b2b9-e814001cf7a3" xlink:to="loc_coty_JABBeautyBVMember_019c6cca-06c5-7d4a-b057-ca7ef87de0a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_KKRMember_019c6cca-06c5-7510-b0c9-593e96896052" xlink:href="coty-20260331.xsd#coty_KKRMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7fab-b2b9-e814001cf7a3" xlink:to="loc_coty_KKRMember_019c6cca-06c5-7510-b0c9-593e96896052" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_019c6cca-06c5-7651-b746-1dca3ba30066" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_dei_LegalEntityAxis_019c6cca-06c5-7651-b746-1dca3ba30066" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c6cca-06c5-7651-b746-1dca3ba30066_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_019c6cca-06c5-7651-b746-1dca3ba30066" xlink:to="loc_dei_EntityDomain_019c6cca-06c5-7651-b746-1dca3ba30066_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_019c6cca-06c5-7980-b8dd-0361934412e9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_019c6cca-06c5-7651-b746-1dca3ba30066" xlink:to="loc_dei_EntityDomain_019c6cca-06c5-7980-b8dd-0361934412e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_HFSHoldingsSRlMember_019c6cca-06c5-7091-b802-3c68c91b843d" xlink:href="coty-20260331.xsd#coty_HFSHoldingsSRlMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_019c6cca-06c5-7980-b8dd-0361934412e9" xlink:to="loc_coty_HFSHoldingsSRlMember_019c6cca-06c5-7091-b802-3c68c91b843d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-78fe-b6d1-5650c172285d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-77b3-a7f1-40e1e31a5ae9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-78fe-b6d1-5650c172285d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-7ae7-94ee-e18ab96808a5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-78fe-b6d1-5650c172285d" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-7ae7-94ee-e18ab96808a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RestrictedStockUnitsAndPhantomUnitsMember_019c6cca-06c5-7874-82d4-96be17c8d068" xlink:href="coty-20260331.xsd#coty_RestrictedStockUnitsAndPhantomUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-78fe-b6d1-5650c172285d" xlink:to="loc_coty_RestrictedStockUnitsAndPhantomUnitsMember_019c6cca-06c5-7874-82d4-96be17c8d068" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_019c6cca-06c5-76a2-a63a-2d561dd30776" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_019c6cca-06c5-76a2-a63a-2d561dd30776" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c6cca-06c5-76a2-a63a-2d561dd30776_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c6cca-06c5-76a2-a63a-2d561dd30776" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c6cca-06c5-76a2-a63a-2d561dd30776_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_019c6cca-06c5-7930-a453-02852cc075aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_019c6cca-06c5-76a2-a63a-2d561dd30776" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_019c6cca-06c5-7930-a453-02852cc075aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCurrentLiabilitiesMember_019c6cca-06c5-76c3-b6f2-aa911db32a62" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCurrentLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_019c6cca-06c5-7930-a453-02852cc075aa" xlink:to="loc_us-gaap_OtherCurrentLiabilitiesMember_019c6cca-06c5-76c3-b6f2-aa911db32a62" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramAxis_019c6cca-06c5-7120-9d33-7aad0ab26947" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_srt_ShareRepurchaseProgramAxis_019c6cca-06c5-7120-9d33-7aad0ab26947" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-7120-9d33-7aad0ab26947_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019c6cca-06c5-7120-9d33-7aad0ab26947" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-7120-9d33-7aad0ab26947_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-76e1-b6a2-9cfacf87de27" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ShareRepurchaseProgramAxis_019c6cca-06c5-7120-9d33-7aad0ab26947" xlink:to="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-76e1-b6a2-9cfacf87de27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IncrementalRepurchaseProgramMember_019c6cca-06c5-783a-8ce1-6212c9910bc8" xlink:href="coty-20260331.xsd#coty_IncrementalRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-76e1-b6a2-9cfacf87de27" xlink:to="loc_coty_IncrementalRepurchaseProgramMember_019c6cca-06c5-783a-8ce1-6212c9910bc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareRepurchaseProgramMember_019c6cca-06c5-78cf-bbdb-f1a5ec75d55a" xlink:href="coty-20260331.xsd#coty_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ShareRepurchaseProgramDomain_019c6cca-06c5-76e1-b6a2-9cfacf87de27" xlink:to="loc_coty_ShareRepurchaseProgramMember_019c6cca-06c5-78cf-bbdb-f1a5ec75d55a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_019c6cca-06c5-762f-8c20-0d5434706354" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_019c6cca-06c5-7a28-a06e-ad5110d38a11" xlink:to="loc_us-gaap_FinancialInstrumentAxis_019c6cca-06c5-762f-8c20-0d5434706354" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-762f-8c20-0d5434706354_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019c6cca-06c5-762f-8c20-0d5434706354" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-762f-8c20-0d5434706354_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-7c6d-be4d-79f5ac2d59f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_019c6cca-06c5-762f-8c20-0d5434706354" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-7c6d-be4d-79f5ac2d59f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_December2022ForwardContractsMember_019c6cca-06c5-7395-82d1-225c481d1036" xlink:href="coty-20260331.xsd#coty_December2022ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-7c6d-be4d-79f5ac2d59f0" xlink:to="loc_coty_December2022ForwardContractsMember_019c6cca-06c5-7395-82d1-225c481d1036" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_November2023ForwardContractsMember_019c6cca-06c5-7c66-9ab5-739623ca7d3c" xlink:href="coty-20260331.xsd#coty_November2023ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_019c6cca-06c5-7c6d-be4d-79f5ac2d59f0" xlink:to="loc_coty_November2023ForwardContractsMember_019c6cca-06c5-7c66-9ab5-739623ca7d3c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c6cca-06c5-7720-b4a9-eca52852eb86" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c6cca-06c5-7720-b4a9-eca52852eb86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_VotingRightsNumberOfVotesEntitledForHolders_019c6cca-06c5-79e2-9273-158713005ca9" xlink:href="coty-20260331.xsd#coty_VotingRightsNumberOfVotesEntitledForHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_VotingRightsNumberOfVotesEntitledForHolders_019c6cca-06c5-79e2-9273-158713005ca9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_019c6cca-06c5-7f1b-9dea-8a23c3f13b71" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_019c6cca-06c5-7f1b-9dea-8a23c3f13b71" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_019c6cca-06c5-7f03-ab96-ab4520d415f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_019c6cca-06c5-7f03-ab96-ab4520d415f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ParentOwnershipPercentage_019c6cca-06c5-7158-9a1f-90eb64ab81c6" xlink:href="coty-20260331.xsd#coty_ParentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_ParentOwnershipPercentage_019c6cca-06c5-7158-9a1f-90eb64ab81c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_019c6cca-06c5-725c-a934-17a361ecdb94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_019c6cca-06c5-725c-a934-17a361ecdb94" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_019c6cca-06c5-7408-81d5-fc22e5ca71ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_019c6cca-06c5-7408-81d5-fc22e5ca71ec" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_019c6cca-06c5-7007-97a5-e8a1642432c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockSharesIssued_019c6cca-06c5-7007-97a5-e8a1642432c1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c6cca-06c5-7ae7-b670-228efb5a6a01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_019c6cca-06c5-7ae7-b670-228efb5a6a01" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockRedemptionPricePerShare_019c6cca-06c5-72e0-bc0b-680ed8a3b7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockRedemptionPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockRedemptionPricePerShare_019c6cca-06c5-72e0-bc0b-680ed8a3b7b4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_SaleOfStockNumberOfSharesAuthorizedInTransaction_019c6cca-06c5-793b-b6b1-ba6f21a641e0" xlink:href="coty-20260331.xsd#coty_SaleOfStockNumberOfSharesAuthorizedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_SaleOfStockNumberOfSharesAuthorizedInTransaction_019c6cca-06c5-793b-b6b1-ba6f21a641e0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockPricePerShare_019c6cca-06c5-7bad-86af-5701ba480807" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SaleOfStockPricePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_SaleOfStockPricePerShare_019c6cca-06c5-7bad-86af-5701ba480807" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_019c6cca-06c5-7c13-8e56-8452306f3c51" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_019c6cca-06c5-7c13-8e56-8452306f3c51" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPreferredStock_019c6cca-06c5-7361-b874-0dbd0d5b5e5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_DividendsPreferredStock_019c6cca-06c5-7361-b874-0dbd0d5b5e5d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PaymentOfOrdinaryDividendsPreferredStockAndPreferenceStockDeclaredDuringThePeriod_019c6cca-06c5-7312-8722-a415e46ba9a2" xlink:href="coty-20260331.xsd#coty_PaymentOfOrdinaryDividendsPreferredStockAndPreferenceStockDeclaredDuringThePeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_PaymentOfOrdinaryDividendsPreferredStockAndPreferenceStockDeclaredDuringThePeriod_019c6cca-06c5-7312-8722-a415e46ba9a2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_019c6cca-06c5-7029-b695-a068768a8cda" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_DividendsPayableCurrentAndNoncurrent_019c6cca-06c5-7029-b695-a068768a8cda" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Dividends_019c6cca-06c5-7988-9550-88c028ed5fef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Dividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_Dividends_019c6cca-06c5-7988-9550-88c028ed5fef" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AdjustmentsToAdditionalPaidInCapitalChangeInDividendsAccrued_019c6cca-06c5-7c3f-bbfa-be94e7cb186e" xlink:href="coty-20260331.xsd#coty_AdjustmentsToAdditionalPaidInCapitalChangeInDividendsAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_AdjustmentsToAdditionalPaidInCapitalChangeInDividendsAccrued_019c6cca-06c5-7c3f-bbfa-be94e7cb186e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends_019c6cca-06c5-739e-b041-b74c76a3e1ef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends_019c6cca-06c5-739e-b041-b74c76a3e1ef" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c6cca-06c5-7f7a-ad14-cfd79506d5de" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramAuthorizedAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_srt_StockRepurchaseProgramAuthorizedAmount1_019c6cca-06c5-7f7a-ad14-cfd79506d5de" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_StockRepurchaseProgramAdditionalAmountAuthorizedToBeRepurchased_019c6cca-06c5-7f94-93cd-7a26356cd77f" xlink:href="coty-20260331.xsd#coty_StockRepurchaseProgramAdditionalAmountAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_StockRepurchaseProgramAdditionalAmountAuthorizedToBeRepurchased_019c6cca-06c5-7f94-93cd-7a26356cd77f" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019c6cca-06c5-789e-a04d-dee4a0e9a76f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_019c6cca-06c5-789e-a04d-dee4a0e9a76f" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_DerivativeForwardRepurchaseContractsTerm_019c6cca-06c5-74bc-84e0-7ef4ae0e0005" xlink:href="coty-20260331.xsd#coty_DerivativeForwardRepurchaseContractsTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_DerivativeForwardRepurchaseContractsTerm_019c6cca-06c5-74bc-84e0-7ef4ae0e0005" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_InterestRateBasicSpreadOnVariableRate_019c6cca-06c5-7461-ae4e-0c799f9c24ce" xlink:href="coty-20260331.xsd#coty_InterestRateBasicSpreadOnVariableRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_InterestRateBasicSpreadOnVariableRate_019c6cca-06c5-7461-ae4e-0c799f9c24ce" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_CashPaymentsToCounterparties_019c6cca-06c5-7e27-a146-17ea7e59cd66" xlink:href="coty-20260331.xsd#coty_CashPaymentsToCounterparties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_coty_CashPaymentsToCounterparties_019c6cca-06c5-7e27-a146-17ea7e59cd66" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_019cddea-3266-7d44-a1a2-89680f990619" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_019c6cca-06c5-7b74-8fcb-67a348becff9" xlink:to="loc_us-gaap_DerivativeNotionalAmount_019cddea-3266-7d44-a1a2-89680f990619" xlink:type="arc" order="25"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/EQUITYANDCONVERTIBLEPREFERREDSTOCKScheduleofaccumulatedothercomprehensiveincomelossDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#EQUITYANDCONVERTIBLEPREFERREDSTOCKScheduleofaccumulatedothercomprehensiveincomelossDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/EQUITYANDCONVERTIBLEPREFERREDSTOCKScheduleofaccumulatedothercomprehensiveincomelossDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c6cca-06c5-7af0-8179-ac29a2da67fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c6cca-06c5-79ea-8575-e32627d84a57" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c6cca-06c5-7af0-8179-ac29a2da67fe" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c6cca-06c5-79ea-8575-e32627d84a57" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-06c5-772d-8658-fdb571cd1e5e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_019c6cca-06c5-79ea-8575-e32627d84a57" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-06c5-772d-8658-fdb571cd1e5e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c6cca-06c5-772d-8658-fdb571cd1e5e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-06c5-772d-8658-fdb571cd1e5e" xlink:to="loc_us-gaap_EquityComponentDomain_019c6cca-06c5-772d-8658-fdb571cd1e5e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_019c6cca-06c5-7666-a1dc-0d17e4b53671" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_019c6cca-06c5-772d-8658-fdb571cd1e5e" xlink:to="loc_us-gaap_EquityComponentDomain_019c6cca-06c5-7666-a1dc-0d17e4b53671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_019c6cca-06c5-7666-a1dc-0d17e4b53671" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019c6cca-06c5-74c3-90f7-cd82eac5ac1f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_019c6cca-06c5-74c3-90f7-cd82eac5ac1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AccumulatedForeignCurrencyAdjustmentGainLossOnNetInvestmentHedgeAttributableToParentMember_019c6cca-06c5-77a6-a9f0-c21b31d4c545" xlink:href="coty-20260331.xsd#coty_AccumulatedForeignCurrencyAdjustmentGainLossOnNetInvestmentHedgeAttributableToParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:to="loc_coty_AccumulatedForeignCurrencyAdjustmentGainLossOnNetInvestmentHedgeAttributableToParentMember_019c6cca-06c5-77a6-a9f0-c21b31d4c545" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019c6cca-06c5-736e-a1ae-dbb1bdf97aef" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_019c6cca-06c5-736e-a1ae-dbb1bdf97aef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019c6cca-06c5-73bf-b3b3-5a5856941128" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_019c6cca-06c5-7779-a068-1db2144a5509" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_019c6cca-06c5-73bf-b3b3-5a5856941128" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c6cca-06c5-7af0-8179-ac29a2da67fe" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-06c5-76f6-b764-69bf5f07d591" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-06c5-76f6-b764-69bf5f07d591" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_019c6cca-06c5-7c59-bf6d-b2f19e26a407" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_019c6cca-06c5-7c59-bf6d-b2f19e26a407" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_019c6cca-06c5-7b92-a208-f3c8b190d037" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_019c6cca-06c5-7b92-a208-f3c8b190d037" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019c6cca-06c5-7fcb-b82f-3c16c57e5c41" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTaxAbstract_019c6cca-06c5-7a29-916a-9662a716b77e" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019c6cca-06c5-7fcb-b82f-3c16c57e5c41" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_019c6cca-06c5-7d65-bd80-870e06999dc1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax_019c6cca-06c5-772b-b1ce-dbc51f44d045" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c6cca-06c5-7af0-8179-ac29a2da67fe" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansBeforeTax_019c6cca-06c5-772b-b1ce-dbc51f44d045" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_OtherComprehensiveIncomeLossBeforeReclassificationAndDefinedBenefitsPlanReclassificationFromAOCITax_019c6cca-06c5-78ff-a489-d85a116059c8" xlink:href="coty-20260331.xsd#coty_OtherComprehensiveIncomeLossBeforeReclassificationAndDefinedBenefitsPlanReclassificationFromAOCITax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_019c6cca-06c5-7af0-8179-ac29a2da67fe" xlink:to="loc_coty_OtherComprehensiveIncomeLossBeforeReclassificationAndDefinedBenefitsPlanReclassificationFromAOCITax_019c6cca-06c5-78ff-a489-d85a116059c8" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/SHAREBASEDCOMPENSATIONPLANSScheduleofsharebasedcompensationDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#SHAREBASEDCOMPENSATIONPLANSScheduleofsharebasedcompensationDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/SHAREBASEDCOMPENSATIONPLANSScheduleofsharebasedcompensationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-712d-a6ef-48e4093dd852" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7ff4-8070-9405f87aa777" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-712d-a6ef-48e4093dd852" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7ff4-8070-9405f87aa777" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c6cca-06c5-73eb-8a30-08b7d778521b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7ff4-8070-9405f87aa777" xlink:to="loc_us-gaap_PlanNameAxis_019c6cca-06c5-73eb-8a30-08b7d778521b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c6cca-06c5-73eb-8a30-08b7d778521b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019c6cca-06c5-73eb-8a30-08b7d778521b" xlink:to="loc_us-gaap_PlanNameDomain_019c6cca-06c5-73eb-8a30-08b7d778521b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c6cca-06c5-74a1-a015-567d1aa20ab0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019c6cca-06c5-73eb-8a30-08b7d778521b" xlink:to="loc_us-gaap_PlanNameDomain_019c6cca-06c5-74a1-a015-567d1aa20ab0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquityPlanExpenseMember_019c6cca-06c5-7347-94f1-d39ae728ce28" xlink:href="coty-20260331.xsd#coty_EquityPlanExpenseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c6cca-06c5-74a1-a015-567d1aa20ab0" xlink:to="loc_coty_EquityPlanExpenseMember_019c6cca-06c5-7347-94f1-d39ae728ce28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_LiabilityPlanMember_019c6cca-06c5-7263-a6a3-3f54c965cfee" xlink:href="coty-20260331.xsd#coty_LiabilityPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c6cca-06c5-74a1-a015-567d1aa20ab0" xlink:to="loc_coty_LiabilityPlanMember_019c6cca-06c5-7263-a6a3-3f54c965cfee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_FringeMember_019c6cca-06c5-72d5-9683-94a05d7125b6" xlink:href="coty-20260331.xsd#coty_FringeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c6cca-06c5-74a1-a015-567d1aa20ab0" xlink:to="loc_coty_FringeMember_019c6cca-06c5-72d5-9683-94a05d7125b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c6cca-06c5-7763-aaed-d10822f568e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-712d-a6ef-48e4093dd852" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c6cca-06c5-7763-aaed-d10822f568e6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/SHAREBASEDCOMPENSATIONPLANSNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#SHAREBASEDCOMPENSATIONPLANSNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/SHAREBASEDCOMPENSATIONPLANSNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-723b-ae09-ef7c924bb83f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:to="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-723b-ae09-ef7c924bb83f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-723b-ae09-ef7c924bb83f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-723b-ae09-ef7c924bb83f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-723b-ae09-ef7c924bb83f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_019c6cca-06c5-723b-ae09-ef7c924bb83f" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_019c6cca-06c5-7180-bf4b-2c9a15264566" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_us-gaap_EmployeeStockOptionMember_019c6cca-06c5-7180-bf4b-2c9a15264566" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RestrictedStockUnitsAndOtherShareAwardsMember_019c6cca-06c5-76df-901d-83697cfb5219" xlink:href="coty-20260331.xsd#coty_RestrictedStockUnitsAndOtherShareAwardsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_coty_RestrictedStockUnitsAndOtherShareAwardsMember_019c6cca-06c5-76df-901d-83697cfb5219" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_PerformanceRestrictedStockUnitsMember_019c6cca-06c5-792c-b27c-4b02dcbd1fda" xlink:href="coty-20260331.xsd#coty_PerformanceRestrictedStockUnitsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_coty_PerformanceRestrictedStockUnitsMember_019c6cca-06c5-792c-b27c-4b02dcbd1fda" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-79b8-a77b-3d773e291d2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-79b8-a77b-3d773e291d2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RestrictedStockUnitsAndStockOptionsMember_019db4a1-c427-7a97-818d-dd0957c00059" xlink:href="coty-20260331.xsd#coty_RestrictedStockUnitsAndStockOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_coty_RestrictedStockUnitsAndStockOptionsMember_019db4a1-c427-7a97-818d-dd0957c00059" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_NonQualifiedOptionsMember_019c6cca-06c5-745c-ab78-a8c0b19f55eb" xlink:href="coty-20260331.xsd#coty_NonQualifiedOptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_019c6cca-06c5-710d-a8a4-dde9d70e2254" xlink:to="loc_coty_NonQualifiedOptionsMember_019c6cca-06c5-745c-ab78-a8c0b19f55eb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_019c6cca-06c5-7382-8557-ebacbaa21e88" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:to="loc_srt_TitleOfIndividualAxis_019c6cca-06c5-7382-8557-ebacbaa21e88" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019c6cca-06c5-7382-8557-ebacbaa21e88_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_019c6cca-06c5-7382-8557-ebacbaa21e88" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019c6cca-06c5-7382-8557-ebacbaa21e88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019c6cca-06c5-7cef-b229-633058c2c64e" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_019c6cca-06c5-7382-8557-ebacbaa21e88" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019c6cca-06c5-7cef-b229-633058c2c64e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ChiefExecutiveOfficerMember_019c6cca-06c5-7676-9085-3ff51bcac799" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefExecutiveOfficerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_019c6cca-06c5-7cef-b229-633058c2c64e" xlink:to="loc_srt_ChiefExecutiveOfficerMember_019c6cca-06c5-7676-9085-3ff51bcac799" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_019c6cca-06c5-718e-8186-1cfcbbc9c5b9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:to="loc_us-gaap_PlanNameAxis_019c6cca-06c5-718e-8186-1cfcbbc9c5b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c6cca-06c5-718e-8186-1cfcbbc9c5b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_019c6cca-06c5-718e-8186-1cfcbbc9c5b9" xlink:to="loc_us-gaap_PlanNameDomain_019c6cca-06c5-718e-8186-1cfcbbc9c5b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_019c6cca-06c5-7c88-b20d-e96974c57782" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_019c6cca-06c5-718e-8186-1cfcbbc9c5b9" xlink:to="loc_us-gaap_PlanNameDomain_019c6cca-06c5-7c88-b20d-e96974c57782" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_SecondRestrictedStockUnitsAwardMember_019c6cca-06c5-7aa6-a375-748864f93837" xlink:href="coty-20260331.xsd#coty_SecondRestrictedStockUnitsAwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_019c6cca-06c5-7c88-b20d-e96974c57782" xlink:to="loc_coty_SecondRestrictedStockUnitsAwardMember_019c6cca-06c5-7aa6-a375-748864f93837" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7eb5-827e-ce0c0051453e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7eb5-827e-ce0c0051453e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7eb5-827e-ce0c0051453e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7eb5-827e-ce0c0051453e" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7eb5-827e-ce0c0051453e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7115-8195-ce9d45645b12" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019c6cca-06c5-7eb5-827e-ce0c0051453e" xlink:to="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7115-8195-ce9d45645b12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_019c6cca-06c5-7966-9a3a-62a9dba38a1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019c6cca-06c5-7115-8195-ce9d45645b12" xlink:to="loc_us-gaap_CommonClassAMember_019c6cca-06c5-7966-9a3a-62a9dba38a1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingAxis_019c6cca-06c5-75e1-b229-13cc70d3581d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_019c6cca-06c5-7487-9bb1-2ab2b98a9573" xlink:to="loc_us-gaap_VestingAxis_019c6cca-06c5-75e1-b229-13cc70d3581d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c6cca-06c5-75e1-b229-13cc70d3581d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VestingAxis_019c6cca-06c5-75e1-b229-13cc70d3581d" xlink:to="loc_us-gaap_VestingDomain_019c6cca-06c5-75e1-b229-13cc70d3581d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VestingDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VestingAxis_019c6cca-06c5-75e1-b229-13cc70d3581d" xlink:to="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c6cca-06c5-7b73-aa23-aba7516f9dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheOneMember_019c6cca-06c5-7b73-aa23-aba7516f9dd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c6cca-06c5-7ff3-ac50-896b2e46c4d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheTwoMember_019c6cca-06c5-7ff3-ac50-896b2e46c4d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019c6cca-06c5-7d4e-a32a-2c0d486627f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationAwardTrancheThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:to="loc_us-gaap_ShareBasedCompensationAwardTrancheThreeMember_019c6cca-06c5-7d4e-a32a-2c0d486627f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedPaymentArrangementTrancheFourMember_019c6cca-06c5-7c62-a7f5-a572012838bb" xlink:href="coty-20260331.xsd#coty_ShareBasedPaymentArrangementTrancheFourMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:to="loc_coty_ShareBasedPaymentArrangementTrancheFourMember_019c6cca-06c5-7c62-a7f5-a572012838bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedPaymentArrangementTrancheFiveMember_019c6cca-06c5-7c79-b8d7-09d539bb1035" xlink:href="coty-20260331.xsd#coty_ShareBasedPaymentArrangementTrancheFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VestingDomain_019c6cca-06c5-73dd-a778-638b80ad4061" xlink:to="loc_coty_ShareBasedPaymentArrangementTrancheFiveMember_019c6cca-06c5-7c79-b8d7-09d539bb1035" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019c6cca-06c5-7681-a2ad-b09ad90e9e3d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_019c6cca-06c5-7681-a2ad-b09ad90e9e3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c6cca-06c5-7e56-b3fe-a4f7dbef8233" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_019c6cca-06c5-7e56-b3fe-a4f7dbef8233" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c6cca-06c5-7e71-86ab-1ddd8cd89b84" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_019c6cca-06c5-7e71-86ab-1ddd8cd89b84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c6cca-06c5-7d64-afd2-bbbfa7b0b8d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019c6cca-06c5-7d64-afd2-bbbfa7b0b8d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeIssuedUponVesting_019c6cca-06c5-7dc7-9fb3-487501c9cb71" xlink:href="coty-20260331.xsd#coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeIssuedUponVesting"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesToBeIssuedUponVesting_019c6cca-06c5-7dc7-9fb3-487501c9cb71" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c6cca-06c5-7e7d-a227-31d5c94704e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_019c6cca-06c5-7e7d-a227-31d5c94704e2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c6cca-06c5-7d92-8d46-be71600491bf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_019c6cca-06c5-7d92-8d46-be71600491bf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c6cca-06c5-7a5b-9095-c0172ce9a959" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage_019c6cca-06c5-7a5b-9095-c0172ce9a959" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c6cca-06c5-701b-87f8-f1ddda469e70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_019c6cca-06c5-701b-87f8-f1ddda469e70" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageHighThreshold_019db4f9-37fd-7032-9459-47c0719359ba" xlink:href="coty-20260331.xsd#coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageHighThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageHighThreshold_019db4f9-37fd-7032-9459-47c0719359ba" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetHighThreshold_019db4e8-c99c-7413-9cac-2c13dfd2d045" xlink:href="coty-20260331.xsd#coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetHighThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetHighThreshold_019db4e8-c99c-7413-9cac-2c13dfd2d045" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageLowThreshold_019db4f9-e058-77e8-a4e9-c9d237019fa0" xlink:href="coty-20260331.xsd#coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageLowThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageLowThreshold_019db4f9-e058-77e8-a4e9-c9d237019fa0" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetLowThreshold_019db4e8-9bc2-7695-b97b-04396879dbed" xlink:href="coty-20260331.xsd#coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetLowThreshold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_019c6cca-06c5-77ca-97c7-7d468dce6ed3" xlink:to="loc_coty_ShareBasedCompensationArrangementByShareBasedPaymentAwardMarketConditionPriceTargetLowThreshold_019db4e8-9bc2-7695-b97b-04396879dbed" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/NETLOSSATTRIBUTABLETOCOTYINCPERCOMMONSHAREDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#NETLOSSATTRIBUTABLETOCOTYINCPERCOMMONSHAREDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/NETLOSSATTRIBUTABLETOCOTYINCPERCOMMONSHAREDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c6cca-06c5-74cf-851b-1433eef17be8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c6cca-06c5-74cf-851b-1433eef17be8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c6cca-06c5-776a-9de1-fd3c3309151f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_019c6cca-06c5-74cf-851b-1433eef17be8" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c6cca-06c5-776a-9de1-fd3c3309151f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-776a-9de1-fd3c3309151f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c6cca-06c5-776a-9de1-fd3c3309151f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-776a-9de1-fd3c3309151f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_019c6cca-06c5-776a-9de1-fd3c3309151f" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ShareBasedPaymentArrangementOptionAndSeriesAPreferredStockMember_019c6cca-06c5-76b9-b13a-ab7c6dbb3217" xlink:href="coty-20260331.xsd#coty_ShareBasedPaymentArrangementOptionAndSeriesAPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:to="loc_coty_ShareBasedPaymentArrangementOptionAndSeriesAPreferredStockMember_019c6cca-06c5-76b9-b13a-ab7c6dbb3217" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesAPreferredStockMember_019c6cca-06c5-7e03-9249-f4118dde1d89" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesAPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:to="loc_us-gaap_SeriesAPreferredStockMember_019c6cca-06c5-7e03-9249-f4118dde1d89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-7f8b-896c-25ac080e8170" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_019c6cca-06c5-7f8b-896c-25ac080e8170" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeriesBPreferredStockMember_019c6cca-06c5-7c54-b35d-9252d808bb3c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeriesBPreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:to="loc_us-gaap_SeriesBPreferredStockMember_019c6cca-06c5-7c54-b35d-9252d808bb3c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForwardContractsMember_019c6cca-06c5-7d74-98e7-99ec84dd88b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForwardContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_019c6cca-06c5-7b3c-b033-35bd5dc07aa8" xlink:to="loc_us-gaap_ForwardContractsMember_019c6cca-06c5-7d74-98e7-99ec84dd88b8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_019c6cca-06c5-7f0b-948c-ac90b4b84d5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_019c6cca-06c5-7f0b-948c-ac90b4b84d5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperations_019c6cca-06c5-7b86-8c22-7bbfdd10617d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_019c6cca-06c5-7f0b-948c-ac90b4b84d5f" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperations_019c6cca-06c5-7b86-8c22-7bbfdd10617d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_019c6cca-06c5-7b1c-8fae-1ffc3c0c3f99" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_019c6cca-06c5-7f0b-948c-ac90b4b84d5f" xlink:to="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_019c6cca-06c5-7b1c-8fae-1ffc3c0c3f99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019c6cca-06c5-7ff7-b3e0-b479186b9b1c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeAmountsAttributableToReportingEntityDisclosuresAbstract_019c6cca-06c5-7f0b-948c-ac90b4b84d5f" xlink:to="loc_us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic_019c6cca-06c5-7ff7-b3e0-b479186b9b1c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019c6cca-06c5-746e-a10a-baa1573ee3b6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019c6cca-06c5-746e-a10a-baa1573ee3b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsStockOptions_019c6cca-06c5-7cea-ac9f-f433daba6704" xlink:href="coty-20260331.xsd#coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsStockOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsStockOptions_019c6cca-06c5-7cea-ac9f-f433daba6704" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsRestrictedStockAndRestrictedStockUnitsRSUs_019c6cca-06c5-7911-bea1-d73cca853465" xlink:href="coty-20260331.xsd#coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsRestrictedStockAndRestrictedStockUnitsRSUs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsRestrictedStockAndRestrictedStockUnitsRSUs_019c6cca-06c5-7911-bea1-d73cca853465" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock_019c6cca-06c5-725b-8834-7002b94cb64d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToConversionOfPreferredStock_019c6cca-06c5-725b-8834-7002b94cb64d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsForwardRepurchaseContracts_019c6cca-06c5-7d42-9068-16e799552601" xlink:href="coty-20260331.xsd#coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsForwardRepurchaseContracts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_coty_IncrementalCommonSharesAttributableToDilutiveEffectOfShareBasedPaymentArrangementsForwardRepurchaseContracts_019c6cca-06c5-7d42-9068-16e799552601" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019c6cca-06c5-7823-82df-7249f5c6de9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingDilutedDisclosureItemsAbstract_019c6cca-06c5-7942-b896-c572516fa337" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019c6cca-06c5-7823-82df-7249f5c6de9a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EarningsPerShareBasicAndDilutedEPSAbstract_019c6cca-06c5-7d8b-9321-3d2d84c4ba05" xlink:href="coty-20260331.xsd#coty_EarningsPerShareBasicAndDilutedEPSAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_coty_EarningsPerShareBasicAndDilutedEPSAbstract_019c6cca-06c5-7d8b-9321-3d2d84c4ba05" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_019c6cca-06c5-7afd-a78e-72e68a965415" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_EarningsPerShareBasicAndDilutedEPSAbstract_019c6cca-06c5-7d8b-9321-3d2d84c4ba05" xlink:to="loc_us-gaap_EarningsPerShareBasic_019c6cca-06c5-7afd-a78e-72e68a965415" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_019c6cca-06c5-70e0-8a6b-f2beb509bd9e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_coty_EarningsPerShareBasicAndDilutedEPSAbstract_019c6cca-06c5-7d8b-9321-3d2d84c4ba05" xlink:to="loc_us-gaap_EarningsPerShareDiluted_019c6cca-06c5-70e0-8a6b-f2beb509bd9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c6cca-06c5-7a93-8ce7-530e1ecadde6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_019c6cca-06c5-7a93-8ce7-530e1ecadde6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendsIncomeStatementImpact_019c6cca-06c5-7646-afa6-dc9303b7e4c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockDividendsIncomeStatementImpact"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_AntidilutiveSecuritiesExcludedFromFairMarketValueAdjustmentsLossGain_019c6cca-06c5-7858-93f7-7f7d7cc0d16e" xlink:href="coty-20260331.xsd#coty_AntidilutiveSecuritiesExcludedFromFairMarketValueAdjustmentsLossGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_019c6cca-06c5-7caa-b18f-e3173e768350" xlink:to="loc_coty_AntidilutiveSecuritiesExcludedFromFairMarketValueAdjustmentsLossGain_019c6cca-06c5-7858-93f7-7f7d7cc0d16e" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/REDEEMABLENONCONTROLLINGINTERESTSDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#REDEEMABLENONCONTROLLINGINTERESTSDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/REDEEMABLENONCONTROLLINGINTERESTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019c6cca-06c5-73b0-a57c-aa0a41289fcb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019c6cca-06c5-7300-984c-e02fdb007526" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019c6cca-06c5-73b0-a57c-aa0a41289fcb" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019c6cca-06c5-7300-984c-e02fdb007526" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_019c6cca-06c5-7fa3-a5bb-6b5d977e9160" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestByLegalEntityTable_019c6cca-06c5-7300-984c-e02fdb007526" xlink:to="loc_srt_OwnershipAxis_019c6cca-06c5-7fa3-a5bb-6b5d977e9160" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c6cca-06c5-7fa3-a5bb-6b5d977e9160_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_019c6cca-06c5-7fa3-a5bb-6b5d977e9160" xlink:to="loc_srt_OwnershipDomain_019c6cca-06c5-7fa3-a5bb-6b5d977e9160_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_019c6cca-06c5-740d-8ea2-3ed38c7fc100" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_019c6cca-06c5-7fa3-a5bb-6b5d977e9160" xlink:to="loc_srt_OwnershipDomain_019c6cca-06c5-740d-8ea2-3ed38c7fc100" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_MiddleEastSubsidiaryMember_019c6cca-06c5-742a-9938-e3380ab037b2" xlink:href="coty-20260331.xsd#coty_MiddleEastSubsidiaryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_019c6cca-06c5-740d-8ea2-3ed38c7fc100" xlink:to="loc_coty_MiddleEastSubsidiaryMember_019c6cca-06c5-742a-9938-e3380ab037b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019c6cca-06c5-7aaa-8810-5c02fc6481d9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019c6cca-06c5-73b0-a57c-aa0a41289fcb" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners_019c6cca-06c5-7aaa-8810-5c02fc6481d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019c6cca-06c5-77a4-a52c-f01e701ac133" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RedeemableNoncontrollingInterestLineItems_019c6cca-06c5-73b0-a57c-aa0a41289fcb" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_019c6cca-06c5-77a4-a52c-f01e701ac133" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/COMMITMENTANDCONTINGENCIESScheduleofincometaxcontingenciesDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#COMMITMENTANDCONTINGENCIESScheduleofincometaxcontingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/COMMITMENTANDCONTINGENCIESScheduleofincometaxcontingenciesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-7849-a587-73b2973d3a2f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-7849-a587-73b2973d3a2f" xlink:to="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019c6cca-06c5-7b85-bcdf-0676d09445e0" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:to="loc_srt_LitigationCaseAxis_019c6cca-06c5-7b85-bcdf-0676d09445e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7b85-bcdf-0676d09445e0_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019c6cca-06c5-7b85-bcdf-0676d09445e0" xlink:to="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7b85-bcdf-0676d09445e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7352-a689-e0a73f609622" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019c6cca-06c5-7b85-bcdf-0676d09445e0" xlink:to="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7352-a689-e0a73f609622" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BrazilianTaxAssessmentsMember_019c6cca-06c5-73ee-9133-0b8735ca6335" xlink:href="coty-20260331.xsd#coty_BrazilianTaxAssessmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7352-a689-e0a73f609622" xlink:to="loc_coty_BrazilianTaxAssessmentsMember_019c6cca-06c5-73ee-9133-0b8735ca6335" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-7250-90fb-bdcabc2d95e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:to="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-7250-90fb-bdcabc2d95e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-7250-90fb-bdcabc2d95e8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-7250-90fb-bdcabc2d95e8" xlink:to="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-7250-90fb-bdcabc2d95e8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-78d2-b429-5ea0c6641687" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-7250-90fb-bdcabc2d95e8" xlink:to="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-78d2-b429-5ea0c6641687" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PendingLitigationMember_019c6cca-06c5-7ecf-9703-775673db4f64" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PendingLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-78d2-b429-5ea0c6641687" xlink:to="loc_us-gaap_PendingLitigationMember_019c6cca-06c5-7ecf-9703-775673db4f64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7348-887c-bd12092fbc66" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7348-887c-bd12092fbc66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-7348-887c-bd12092fbc66_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7348-887c-bd12092fbc66" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-7348-887c-bd12092fbc66_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-70d3-8a28-13e4ab62d1a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7348-887c-bd12092fbc66" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-70d3-8a28-13e4ab62d1a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ForeignStateTaxAuthorityMember_019c6cca-06c5-7ef4-9450-32ddafd7d4b7" xlink:href="coty-20260331.xsd#coty_ForeignStateTaxAuthorityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-70d3-8a28-13e4ab62d1a6" xlink:to="loc_coty_ForeignStateTaxAuthorityMember_019c6cca-06c5-7ef4-9450-32ddafd7d4b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ForeignFederalTaxAuthorityMember_019c6cca-06c5-7f00-85c1-a8d07946c1c6" xlink:href="coty-20260331.xsd#coty_ForeignFederalTaxAuthorityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-70d3-8a28-13e4ab62d1a6" xlink:to="loc_coty_ForeignFederalTaxAuthorityMember_019c6cca-06c5-7f00-85c1-a8d07946c1c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodAxis_019c6cca-06c5-73a1-a6eb-9e840414c9c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-7149-9262-5b47242c90da" xlink:to="loc_us-gaap_TaxPeriodAxis_019c6cca-06c5-73a1-a6eb-9e840414c9c4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-73a1-a6eb-9e840414c9c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_019c6cca-06c5-73a1-a6eb-9e840414c9c4" xlink:to="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-73a1-a6eb-9e840414c9c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_019c6cca-06c5-73a1-a6eb-9e840414c9c4" xlink:to="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2017Through2019Member_019c6cca-06c5-7754-b060-a80d27d624a9" xlink:href="coty-20260331.xsd#coty_TaxYears2017Through2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2017Through2019Member_019c6cca-06c5-7754-b060-a80d27d624a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2016And2017Member_019c6cca-06c5-7cf4-9f30-95e2be8c85d0" xlink:href="coty-20260331.xsd#coty_TaxYears2016And2017Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2016And2017Member_019c6cca-06c5-7cf4-9f30-95e2be8c85d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2018Through2019Member_019c6cca-06c5-799c-8a00-8d75b7cbb10a" xlink:href="coty-20260331.xsd#coty_TaxYears2018Through2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2018Through2019Member_019c6cca-06c5-799c-8a00-8d75b7cbb10a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2020Member_019c6cca-06c5-7ffe-bf5c-7e3dcb2b2989" xlink:href="coty-20260331.xsd#coty_TaxYears2020Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2020Member_019c6cca-06c5-7ffe-bf5c-7e3dcb2b2989" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2016Through2019Member_019c6cca-06c5-794f-9752-a377e42b71f5" xlink:href="coty-20260331.xsd#coty_TaxYears2016Through2019Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2016Through2019Member_019c6cca-06c5-794f-9752-a377e42b71f5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_TaxYears2016Through2020Member_019c6cca-06c5-7c68-b36b-265c247e056d" xlink:href="coty-20260331.xsd#coty_TaxYears2016Through2020Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_019c6cca-06c5-7f29-ad49-bfd9b3e67be1" xlink:to="loc_coty_TaxYears2016Through2020Member_019c6cca-06c5-7c68-b36b-265c247e056d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_019c6cca-06c5-7b2e-bd76-aefcf4ceee77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-7849-a587-73b2973d3a2f" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_019c6cca-06c5-7b2e-bd76-aefcf4ceee77" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/COMMITMENTANDCONTINGENCIESNarrativeDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#COMMITMENTANDCONTINGENCIESNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/COMMITMENTANDCONTINGENCIESNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-717d-8099-725641bdc0f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-717d-8099-725641bdc0f6" xlink:to="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_019c6cca-06c5-707f-8513-53e413b0cb15" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:to="loc_srt_LitigationCaseAxis_019c6cca-06c5-707f-8513-53e413b0cb15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-707f-8513-53e413b0cb15_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_019c6cca-06c5-707f-8513-53e413b0cb15" xlink:to="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-707f-8513-53e413b0cb15_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7ab3-a9b6-03da88d9b583" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_019c6cca-06c5-707f-8513-53e413b0cb15" xlink:to="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7ab3-a9b6-03da88d9b583" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_BrazilianTaxAssessmentsMember_019c6cca-06c5-74a7-965f-7e9d611bc443" xlink:href="coty-20260331.xsd#coty_BrazilianTaxAssessmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7ab3-a9b6-03da88d9b583" xlink:to="loc_coty_BrazilianTaxAssessmentsMember_019c6cca-06c5-74a7-965f-7e9d611bc443" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_GoiasStateTaxICMSAssessmentMember_019c6cca-06c5-7da3-b1d9-85fb29e88a92" xlink:href="coty-20260331.xsd#coty_GoiasStateTaxICMSAssessmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7ab3-a9b6-03da88d9b583" xlink:to="loc_coty_GoiasStateTaxICMSAssessmentMember_019c6cca-06c5-7da3-b1d9-85fb29e88a92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_MinasGeraisStateTaxICMSAssessmentMember_019c6cca-06c5-798f-a710-a2135ca1524f" xlink:href="coty-20260331.xsd#coty_MinasGeraisStateTaxICMSAssessmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_019c6cca-06c5-7ab3-a9b6-03da88d9b583" xlink:to="loc_coty_MinasGeraisStateTaxICMSAssessmentMember_019c6cca-06c5-798f-a710-a2135ca1524f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7b89-b700-091b7bc3dbb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7b89-b700-091b7bc3dbb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-7b89-b700-091b7bc3dbb8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7b89-b700-091b7bc3dbb8" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-7b89-b700-091b7bc3dbb8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-75aa-a6c7-6eab0394971e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_019c6cca-06c5-7b89-b700-091b7bc3dbb8" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-75aa-a6c7-6eab0394971e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_ForeignStateTaxAuthorityMember_019c6cca-06c5-7841-b7ef-b92960ac95d4" xlink:href="coty-20260331.xsd#coty_ForeignStateTaxAuthorityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_019c6cca-06c5-75aa-a6c7-6eab0394971e" xlink:to="loc_coty_ForeignStateTaxAuthorityMember_019c6cca-06c5-7841-b7ef-b92960ac95d4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-77c2-80cd-af4f49b5e9b5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:to="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-77c2-80cd-af4f49b5e9b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-77c2-80cd-af4f49b5e9b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-77c2-80cd-af4f49b5e9b5" xlink:to="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-77c2-80cd-af4f49b5e9b5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-7905-95a3-30a3080607eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_019c6cca-06c5-77c2-80cd-af4f49b5e9b5" xlink:to="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-7905-95a3-30a3080607eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PendingLitigationMember_019c6cca-06c5-70ce-94e8-8667268dac44" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PendingLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_019c6cca-06c5-7905-95a3-30a3080607eb" xlink:to="loc_us-gaap_PendingLitigationMember_019c6cca-06c5-70ce-94e8-8667268dac44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-735e-a07f-455c6b912db4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_019c6cca-06c5-76d8-be07-cb80c2135b1d" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-735e-a07f-455c6b912db4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-735e-a07f-455c6b912db4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-735e-a07f-455c6b912db4" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-735e-a07f-455c6b912db4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-79fc-b198-b8ee154eb2fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-735e-a07f-455c6b912db4" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-79fc-b198-b8ee154eb2fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SuretyBondMember_019c6cca-06c5-703f-8d73-c12cfee53282" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SuretyBondMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-79fc-b198-b8ee154eb2fb" xlink:to="loc_us-gaap_SuretyBondMember_019c6cca-06c5-703f-8d73-c12cfee53282" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_CashDepositsMember_019c6cca-06c5-7688-88a2-bcc6fed3d048" xlink:href="coty-20260331.xsd#coty_CashDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-79fc-b198-b8ee154eb2fb" xlink:to="loc_coty_CashDepositsMember_019c6cca-06c5-7688-88a2-bcc6fed3d048" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_019c6cca-06c5-7ae1-aa4a-df8e313c0153" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-717d-8099-725641bdc0f6" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued_019c6cca-06c5-7ae1-aa4a-df8e313c0153" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForOtherDeposits_019c6cca-06c5-7009-a667-d65277f3f32f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForOtherDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_019c6cca-06c5-717d-8099-725641bdc0f6" xlink:to="loc_us-gaap_PaymentsForOtherDeposits_019c6cca-06c5-7009-a667-d65277f3f32f" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#RELATEDPARTYTRANSACTIONSDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/RELATEDPARTYTRANSACTIONSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-701a-9a27-c00b56e03db3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-701a-9a27-c00b56e03db3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-701a-9a27-c00b56e03db3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-701a-9a27-c00b56e03db3" xlink:to="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-701a-9a27-c00b56e03db3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7199-8f86-cbdf6ebba1f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_019c6cca-06c5-701a-9a27-c00b56e03db3" xlink:to="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7199-8f86-cbdf6ebba1f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_JABPartnersLLPMember_019c6cca-06c5-77f9-ac20-ab0cb7d4a47d" xlink:href="coty-20260331.xsd#coty_JABPartnersLLPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7199-8f86-cbdf6ebba1f5" xlink:to="loc_coty_JABPartnersLLPMember_019c6cca-06c5-77f9-ac20-ab0cb7d4a47d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_WellaCompanyMember_019c6cca-06c5-792c-b342-96173bc28eb5" xlink:href="coty-20260331.xsd#coty_WellaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_019c6cca-06c5-7199-8f86-cbdf6ebba1f5" xlink:to="loc_coty_WellaCompanyMember_019c6cca-06c5-792c-b342-96173bc28eb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-72b0-b1e1-24ad97799a54" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-72b0-b1e1-24ad97799a54" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-72b0-b1e1-24ad97799a54_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-72b0-b1e1-24ad97799a54" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-72b0-b1e1-24ad97799a54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-7eb4-92a6-3c449ab1434f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_019c6cca-06c5-72b0-b1e1-24ad97799a54" xlink:to="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-7eb4-92a6-3c449ab1434f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceGuaranteeMember_019c6cca-06c5-7ff3-9f91-75219e6c42d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PerformanceGuaranteeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_019c6cca-06c5-7eb4-92a6-3c449ab1434f" xlink:to="loc_us-gaap_PerformanceGuaranteeMember_019c6cca-06c5-7ff3-9f91-75219e6c42d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_019c6cca-06c5-7a40-9f22-236736d2d933" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_019c6cca-06c5-7a40-9f22-236736d2d933" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019c6cca-06c5-7a40-9f22-236736d2d933_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019c6cca-06c5-7a40-9f22-236736d2d933" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019c6cca-06c5-7a40-9f22-236736d2d933_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_019c6cca-06c5-7182-9818-fec970ada169" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_019c6cca-06c5-7a40-9f22-236736d2d933" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_019c6cca-06c5-7182-9818-fec970ada169" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_RelatedPartyTransactionOtherFeesMember_019c6cca-06c5-748f-bc8b-7c2b3c94c927" xlink:href="coty-20260331.xsd#coty_RelatedPartyTransactionOtherFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_019c6cca-06c5-7182-9818-fec970ada169" xlink:to="loc_coty_RelatedPartyTransactionOtherFeesMember_019c6cca-06c5-748f-bc8b-7c2b3c94c927" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-06c5-76fd-bb98-ebf6b77c70af" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_019c6cca-06c5-7eb9-9a78-cf092b8086e8" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-06c5-76fd-bb98-ebf6b77c70af" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-06c5-76fd-bb98-ebf6b77c70af_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-06c5-76fd-bb98-ebf6b77c70af" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-06c5-76fd-bb98-ebf6b77c70af_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-06c5-7ec9-822c-a3042a539424" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_019c6cca-06c5-76fd-bb98-ebf6b77c70af" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-06c5-7ec9-822c-a3042a539424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_WellaCompanyMember_019c6cca-06c5-7391-895b-8a6b639b0500" xlink:href="coty-20260331.xsd#coty_WellaCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_019c6cca-06c5-7ec9-822c-a3042a539424" xlink:to="loc_coty_WellaCompanyMember_019c6cca-06c5-7391-895b-8a6b639b0500" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019c6cca-06c5-7902-8f16-4bce0eec10d2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseRemainingLeaseTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_LesseeOperatingLeaseRemainingLeaseTerm_019c6cca-06c5-7902-8f16-4bce0eec10d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019c6cca-06c5-7b72-93fd-be206cc78e55" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyEstimateOfPossibleLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_LossContingencyEstimateOfPossibleLoss_019c6cca-06c5-7b72-93fd-be206cc78e55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019c6cca-06c5-73cc-bdea-8d079d9c0f87" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019c6cca-06c5-73cc-bdea-8d079d9c0f87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019c6cca-06c5-7ef0-9378-e6d90b37cf29" xlink:href="coty-20260331.xsd#coty_EquityMethodInvestmentOwnershipPercentageSold"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_coty_EquityMethodInvestmentOwnershipPercentageSold_019c6cca-06c5-7ef0-9378-e6d90b37cf29" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherOperatingIncome_019c6cca-06c5-7645-bb6c-f623432f7919" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherOperatingIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_OtherOperatingIncome_019c6cca-06c5-7645-bb6c-f623432f7919" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_SecondmentAgreementServicePeriodMinimum_019c6cca-06c5-7246-994b-3b50e3f856ae" xlink:href="coty-20260331.xsd#coty_SecondmentAgreementServicePeriodMinimum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_coty_SecondmentAgreementServicePeriodMinimum_019c6cca-06c5-7246-994b-3b50e3f856ae" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019c6cca-06c5-71f0-ba7b-f5ac5b44c152" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019c6cca-06c5-71f0-ba7b-f5ac5b44c152" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_019c6cca-06c5-7c14-b3f5-152800de8f00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_019c6cca-06c5-7107-a2a9-4b7a6def3ca5" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_019c6cca-06c5-7c14-b3f5-152800de8f00" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.coty.com/role/SUBSEQUENTEVENTSDetails" xlink:type="simple" xlink:href="coty-20260331.xsd#SUBSEQUENTEVENTSDetails"/>
  <link:definitionLink xlink:role="http://www.coty.com/role/SUBSEQUENTEVENTSDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_019c6cca-06c5-70a7-8c26-b6d58fb444c7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_019c6cca-06c5-7e88-bd10-18b74c344e18" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_019c6cca-06c5-70a7-8c26-b6d58fb444c7" xlink:to="loc_us-gaap_SubsequentEventTable_019c6cca-06c5-7e88-bd10-18b74c344e18" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_019c6cca-06c5-7792-827b-a88c877d0c59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019c6cca-06c5-7e88-bd10-18b74c344e18" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_019c6cca-06c5-7792-827b-a88c877d0c59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019c6cca-06c5-7792-827b-a88c877d0c59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019c6cca-06c5-7792-827b-a88c877d0c59" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019c6cca-06c5-7792-827b-a88c877d0c59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_019c6cca-06c5-764e-84c8-27dcd6b0dd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_019c6cca-06c5-7792-827b-a88c877d0c59" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_019c6cca-06c5-764e-84c8-27dcd6b0dd2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_019c6cca-06c5-7104-bed4-b9f88993fdb5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_019c6cca-06c5-764e-84c8-27dcd6b0dd2b" xlink:to="loc_us-gaap_SubsequentEventMember_019c6cca-06c5-7104-bed4-b9f88993fdb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_019db510-1b6d-797a-8c1f-ad41c7d50263" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019c6cca-06c5-7e88-bd10-18b74c344e18" xlink:to="loc_us-gaap_DebtInstrumentAxis_019db510-1b6d-797a-8c1f-ad41c7d50263" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db510-1b6d-797a-8c1f-ad41c7d50263_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db510-1b6d-797a-8c1f-ad41c7d50263" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db510-1b6d-797a-8c1f-ad41c7d50263_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_019db510-1b6d-748e-9e76-82b3425d9877" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_019db510-1b6d-797a-8c1f-ad41c7d50263" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_019db510-1b6d-748e-9e76-82b3425d9877" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019db510-1b6d-781e-a4d4-bb894a76487c" xlink:href="coty-20260331.xsd#coty_A2026EuroSeniorSecuredNotesDueApril2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_019db510-1b6d-748e-9e76-82b3425d9877" xlink:to="loc_coty_A2026EuroSeniorSecuredNotesDueApril2026Member_019db510-1b6d-781e-a4d4-bb894a76487c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_019db510-1b6d-77f5-bae0-cc716a3d40c3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_019c6cca-06c5-7e88-bd10-18b74c344e18" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_019db510-1b6d-77f5-bae0-cc716a3d40c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db510-1b6d-77f5-bae0-cc716a3d40c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db510-1b6d-77f5-bae0-cc716a3d40c3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db510-1b6d-77f5-bae0-cc716a3d40c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_019db510-1b6d-7736-be40-48328a786932" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_019db510-1b6d-77f5-bae0-cc716a3d40c3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_019db510-1b6d-7736-be40-48328a786932" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_019db510-1b6d-7d44-a7da-b51c973800d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_019db510-1b6d-7736-be40-48328a786932" xlink:to="loc_us-gaap_SeniorNotesMember_019db510-1b6d-7d44-a7da-b51c973800d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_019db510-1b6d-749b-b268-5b8f09e68cd2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_019c6cca-06c5-70a7-8c26-b6d58fb444c7" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_019db510-1b6d-749b-b268-5b8f09e68cd2" 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/2025/elts/us-roles-2025.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_LiabilitiesAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract" xlink:to="loc_us-gaap_LongTermDebtNoncurrent" xlink:type="arc" order="31"/>
  </link:definitionLink>
</link:linkbase>
