Dictionary definition · veto
noun
- a vote that blocks a decision
- 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)
verb
- vote against; refuse to endorse; refuse to assent"The President vetoed the bill"
- command against"I forbid you to call me late at night"
Source: Open English WordNet (CC BY 4.0).