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semaphore

1 of 2

noun

sem·​a·​phore ˈse-mə-ˌfȯr How to pronounce semaphore (audio)
1
: an apparatus for visual signaling (as by the position of one or more movable arms)
2
: a system of visual signaling by two flags held one in each hand

Illustration of semaphore

Illustration of semaphore
  • alphabet; 3 positions following Z

semaphore

2 of 2

verb

semaphored; semaphoring

transitive verb

: to convey (information) by or as if by semaphore

intransitive verb

: to send signals by or as if by semaphore

Example Sentences

Recent Examples on the Web
Noun
Her eyes blaze, her dancing reads as semaphore; a feeling of overkill, unsettling but necessary, pervades her every move. Dan Piepenbring, Harper’s Magazine , 18 Jan. 2022 It’s not a sentimental picture, but the gestures are intuitive, eloquent, easily read—an elemental semaphore of the human capacity to comfort. Margaret Talbot, The New Yorker, 9 Sep. 2021 The main difference with this method is how the semaphore is initialized. Jacek Krywko, Ars Technica, 2 Oct. 2020 Predictably, this area was a resource locked with a mutex semaphore. Jacek Krywko, Ars Technica, 2 Oct. 2020 The dollar, which has fallen by 6% against a basket of currencies since March, is usually part of the semaphore. The Economist, 11 June 2020 One dancer executed a series of semaphore-like movements, which the dancer on the next roof over tried to copy exactly, and so on down the line. Brian Seibert, New York Times, 7 Apr. 2020 Giotto’s figures make simple, resonant gestures that are at once hauntingly isolated — like private semaphores — and vital markers in an unfolding communal narrative. Washington Post, 26 Feb. 2020 The truck hit the rear of the car, rolled onto its side, left the road and hit a semaphore light. Nick Ferraro, Twin Cities, 3 Oct. 2019
Verb
Poorly directed, singers semaphore conventional, unconvincing theatrical gestures that turn them right back into stock opera characters. Los Angeles Times, 20 Sep. 2021 The movie needs Winslet and Ronan’s skills, their ability to semaphore more with sliding glances and tiny gestures than many actors manage with pages of dialogue. Jeannette Catsoulis, New York Times, 12 Nov. 2020 One of the many things the halted meteorological data gathering couldn’t do on such occasions was release the mutex semaphore to the high-priority bus management task. Jacek Krywko, Ars Technica, 2 Oct. 2020 See More

Word History

Etymology

Noun

Greek sēma sign, signal + International Scientific Vocabulary -phore

First Known Use

Noun

1815, in the meaning defined at sense 1

Verb

1838, in the meaning defined at transitive sense

Time Traveler
The first known use of semaphore was in 1815

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