vetoverbformal/vɨˈtaɾ/mediumve·tarPortuguesEnglishEspanolFrancaisDefinitionTo exercise a veto against (a proposal, law, or decision).The governor vetoed the bill passed by the legislature.Any permanent member of the UN Security Council can veto a resolution.synrejectblockdisallowantapproveauthorizepassEtymologyDo latim 'vetare' (proibir, opor-se).Related wordsvetovetadovetação