noun. an apparatus for visual signaling with lights or mechanically moving arms.
verb. convey by semaphore, of information.
verb. send signals by or as if by semaphore.
1. Noun, singular or mass A semaphore works as a moving arm mounted to a mast. 2. Adjective, comparative Some of the more notable and familiar examples of optical telecommunication systems include navigation lights, flares, semaphore communication and smoke signals.
