<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!--
  This file is part of the Dutch Taxonomy (Nederlandse Taxonomie; NT)
  Intellectual Property of the State of the Netherlands
  Architecture: NT20
  Version: 20251210
  Release date: October 31, 2025
-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink">
  <link:roleRef roleURI="urn:bzk:linkrole:remuneration-of-executive-senior-officials-considered-four-years" xlink:href="../dictionary/bzk-wnt-linkroles.xsd#bzk-wnt-lr_RemunerationOfExecutiveSeniorOfficialsConsideredFourYears" xlink:type="simple"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>
  <link:definitionLink xlink:role="urn:bzk:linkrole:remuneration-of-executive-senior-officials-considered-four-years" xlink:type="extended">
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_InclusionErrorsInRemunerationSeniorOfficials_loc" xlink:type="arc"/>
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_ReasonsAndCauseErrorsInRemuneration_loc" xlink:type="arc"/>
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_ReasonsForExceedingMaximumAmountOfRemuneration_loc" xlink:type="arc"/>
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_ReceivableUnduePaymentsExplanation_loc" xlink:type="arc"/>
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_Remuneration_loc" xlink:type="arc"/>
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_UnduePayments_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_AmountExceedingMaximumRemuneration_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_DoubleCounting_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_RemunerationActivitiesAffiliatedCompanies_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_RemunerationActivitiesSeniorOfficer_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_RemunerationMaximumOrHigherIndividualRemunerationSeniorOfficer_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_RemunerationOtherActivitiesSeniorOfficer_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_SubtotalRemuneration_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_WntInstitutionActivitiesSeniorOfficer_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_WntInstitutionAffiliatedCompanies_loc" xlink:type="arc"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="sbr-dim_ValidationLineItems_loc" xlink:to="bzk-wnt-i_WntInstitutionOtherActivitiesSeniorOfficer_loc" xlink:type="arc"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_AmountExceedingMaximumRemuneration" xlink:label="bzk-wnt-i_AmountExceedingMaximumRemuneration_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_DoubleCounting" xlink:label="bzk-wnt-i_DoubleCounting_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_InclusionErrorsInRemunerationSeniorOfficials" xlink:label="bzk-wnt-i_InclusionErrorsInRemunerationSeniorOfficials_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_ReasonsAndCauseErrorsInRemuneration" xlink:label="bzk-wnt-i_ReasonsAndCauseErrorsInRemuneration_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_ReasonsForExceedingMaximumAmountOfRemuneration" xlink:label="bzk-wnt-i_ReasonsForExceedingMaximumAmountOfRemuneration_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_ReceivableUnduePaymentsExplanation" xlink:label="bzk-wnt-i_ReceivableUnduePaymentsExplanation_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_RemunerationActivitiesAffiliatedCompanies" xlink:label="bzk-wnt-i_RemunerationActivitiesAffiliatedCompanies_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_RemunerationActivitiesSeniorOfficer" xlink:label="bzk-wnt-i_RemunerationActivitiesSeniorOfficer_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_RemunerationMaximumOrHigherIndividualRemunerationSeniorOfficer" xlink:label="bzk-wnt-i_RemunerationMaximumOrHigherIndividualRemunerationSeniorOfficer_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_RemunerationOtherActivitiesSeniorOfficer" xlink:label="bzk-wnt-i_RemunerationOtherActivitiesSeniorOfficer_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_Remuneration" xlink:label="bzk-wnt-i_Remuneration_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_SubtotalRemuneration" xlink:label="bzk-wnt-i_SubtotalRemuneration_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_UnduePayments" xlink:label="bzk-wnt-i_UnduePayments_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_WntInstitutionActivitiesSeniorOfficer" xlink:label="bzk-wnt-i_WntInstitutionActivitiesSeniorOfficer_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_WntInstitutionAffiliatedCompanies" xlink:label="bzk-wnt-i_WntInstitutionAffiliatedCompanies_loc" xlink:type="locator"/>
    <link:loc xlink:href="../dictionary/bzk-wnt-data.xsd#bzk-wnt-i_WntInstitutionOtherActivitiesSeniorOfficer" xlink:label="bzk-wnt-i_WntInstitutionOtherActivitiesSeniorOfficer_loc" xlink:type="locator"/>
    <link:loc xlink:href="http://www.nltaxonomie.nl/2013/xbrl/sbr-dimensional-concepts.xsd#sbr-dim_ValidationLineItems" xlink:label="sbr-dim_ValidationLineItems_loc" xlink:type="locator"/>
  </link:definitionLink>
</link:linkbase>
