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WordReference Random House Learner's Dictionary of American English © 2024sem•a•phore /ˈsɛməˌfɔr/USA pronunciation n., v., -phored, -phor•ing. n. - Telecommunications[uncountable] a system of signaling, esp. one by which a flag is held in each hand and various positions of the arms indicate specific letters, etc.
- [countable] an apparatus used in this system.
v. - Telecommunicationsto signal by semaphore: [~ + object]to semaphore a message.[no object]busily semaphoring to the other ship.
WordReference Random House Unabridged Dictionary of American English © 2024sem•a•phore (sem′ə fôr′, -fōr′),USA pronunciation n., v., -phored, -phor•ing. n. - Telecommunicationsan apparatus for conveying information by means of visual signals, as a light whose position may be changed.
- Telecommunicationsany of various devices for signaling by changing the position of a light, flag, etc.
- Telecommunicationsa system of signaling, esp. a system by which a special flag is held in each hand and various positions of the arms indicate specific letters, numbers, etc.
v.t., v.i. - Telecommunicationsto signal by semaphore or by some system of flags.
- Greek sêma sign + -phore
- 1810–20;
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