definition of
veto

[1] #1 veto n. a vote that blocks a decision. wn

[2] #2 veto v. [blackball, negative] vote against; refuse to endorse; refuse to assent; "The President vetoed the bill". wn

[3] #3 veto v. [forbid, prohibit, interdict, proscribe, disallow, nix] command against; "I forbid you to call me late at night"; "Mother vetoed the trip to the chocolate store"; "Dad nixed our plans". wn

[4] #4 veto n. the power or right to prohibit or reject a proposed or intended act (especially the power of a chief executive to reject a bill passed by the legislature). wn