Veto

A privileged single vote that, according to some systems of rules for decision-making, has the effect of blocking or negating a majority decision. In the United States, the President may veto a bill passed by majorities in both houses of Congress, preventing it from becoming law unless each house then re-passes the bill by a two-thirds majority. In the United Nations Security Council, a negative vote (veto) by even one of the five permanent member states (the USA, Russia, Britain, France and China) has the effect of defeating any proposed Security Council resolution.

See also: