countersign: Meaning and Definition of
coun•ter•sign
Pronunciation: (n., v.koun'tur-sīn"v.also koun"tur-sīn'), [key] — n.
- a sign used in reply to another sign.
- a secret sign that must be given by authorized persons seeking admission through a guarded area.
- a signature added to another signature, esp. for authentication.
—v.t. - to sign (a document that has been signed by someone else), esp. in confirmation or authentication.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.