The response to a sign or signal.
A second signature added to a document to affirm the validity of the signature of the first person.
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.
A prearranged reply to the challenge of a sentry or a guard; a password or signal by which friends can be known from enemies.
A word used as a motto, as expressive of a principle, belief, or rule of action; a rallying cry.