Meaning of SEMAPHORE in English

SEMAPHORE

/ ˈseməfɔː(r); NAmE / noun , verb

■ noun

[ U ] a system for sending signals in which you hold your arms or two flags in particular positions to represent different letters of the alphabet

■ verb

[ v , vn , v that ] to send a message to sb by semaphore or a similar system of signals

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WORD ORIGIN

early 19th cent. (denoting a signalling apparatus): from French sémaphore , formed irregularly from Greek sēma sign + -phoros .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.