semaphore NOUN 1) a system of sending messages by holding the arms or two flags or poles in certain positions according to an alphabetic code. 2) an apparatus for signalling in this way, consisting of an upright with movable parts.
VERB send by semaphore.
DERIVATIVES semaphoric adjective.
ORIGIN French sémaphore, from Greek sma 'sign' + -phoros 'bearing' .

English terms dictionary. 2015.