A second signature added to a document to affirm the validity of the signature of the first person.
The response to a sign or signal.
To sign on the opposite side of (a document).
To add a second signature to a document, affirming the validity of the signature of another person.
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.