the power or right vested in one branch of a government to cancel or postpone the decisions, enactments, etc., of another branch, especially the right of a president, governor, or other chief executive to reject bills passed by the legislature.
the exercise of this right.
Also called veto message. a document exercising such right and setting forth the reasons for such action.
a nonconcurring vote by which one of the five permanent members of the UN Security Council can overrule the actions or decisions of the meeting on matters other than procedural.