Veto power

Veto power is the authority to reject or block decisions, proposals, or legislation. In many contexts, such as in government, it refers to the ability of a person or a body—often a leader or a governing council—to prevent a law or action that has been agreed upon by others. For instance, in the United Nations, the five permanent members of the Security Council (the U.S., Russia, China, France, and the U.K.) can veto decisions, meaning that if any one of them disagrees, the decision cannot be implemented. This power is meant to ensure that significant actions have broad support.