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semaphore (n.)

"apparatus for signaling," 1816, probably via French sémaphore, literally "a bearer of signals," ultimately from Greek sema "sign, signal" (see semantic) + phoros "bearer," from pherein "to carry," from PIE root *bher- (1) "to carry," also "to bear children." Related: Semaphoric (1808).

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Definitions of semaphore from WordNet
1
semaphore (v.)
send signals by or as if by semaphore;
semaphore (v.)
convey by semaphore, of information;
2
semaphore (n.)
an apparatus for visual signaling with lights or mechanically moving arms;
From wordnet.princeton.edu