v (transitive) To cancel or invalidate by withdrawing or reversing
v (intransitive) To fail to follow suit in a game of cards when holding a card in that suit.
n The act of revoking in a game of cards.
n A renege; a violation of important rules regarding the play of tricks in trick-taking card games serious enough to render the round invalid.
n A violation ranked in seriousness somewhat below overt cheating, with the status of a more minor offense only because, when it happens, it is usually accidental.