To erase or strike out.
To eliminate completely; to annihilate.
To delete permanently (e-mail etc.) that was previously marked for deletion but still stored.
To cancel or invalidate by withdrawing or reversing.
The act of revoking in a game of cards.
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.
A renege; a violation of important rules regarding the play of tricks in trick-taking card games serious enough to render the round invalid.