VETO

I. noun (plural ~es) Etymology: Latin, I forbid, from vetare to forbid Date: 1629 an authoritative prohibition ; interdiction, 2. a power of one department or branch of a government to forbid or prohibit finally or provisionally the carrying out of projects attempted by another department, b. the exercise of such authority, a message communicating the reasons of an executive and especially the president of the United States for ~ing a proposed law, II. transitive verb (~ed; ~ing) Date: 1706 to refuse to admit or approve ; prohibit , ~er noun