Etymology
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semaphore (n.)

"mechanical apparatus for signaling to distant points," 1814, from French sémaphore, etymologically, "a bearer of signals," ultimately from Greek sēma "sign, signal" (see semantic) + phoros "bearer," from pherein "to carry" (from PIE root *bher- (1) "to carry"). Related: Semaphoric (1808); semaphorist.

updated on April 24, 2022

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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;
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.