Definition of revokes:
(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.
(v) :
(obsolete) To call or bring back.