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semaphore

American  
[sem-uh-fawr, -fohr] / ˈsɛm əˌfɔr, -ˌfoʊr /

noun

  1. an apparatus for conveying information by means of visual signals, as a light whose position may be changed.

  2. any of various devices for signaling by changing the position of a light, flag, etc.

  3. a system of signaling, especially a system by which a special flag is held in each hand and various positions of the arms indicate specific letters, numbers, etc.


verb (used with or without object)

  • semaphores,
    present (3rd person singular)
  • semaphored,
    past participle,  past
  • semaphoring
    present participle
  1. to signal by semaphore or by some system of flags.

semaphore British  
/ ˈsɛməˌfɔː /

noun

  1. an apparatus for conveying information by means of visual signals, as with movable arms or railway signals, flags, etc

  2. a system of signalling by holding a flag in each hand and moving the arms to designated positions to denote each letter of the alphabet

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

verb

  1. to signal (information) by means of semaphore

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Etymology

Origin of semaphore

First recorded in 1810–20; from French sémaphore, from Greek sêma “sign”; see -phore

Explanation

A semaphore is a gadget used for conveying signals. Semaphores have either lights or mechanical arms that move. The word semaphore is related to a Greek word meaning "signal," and that's exactly the purpose of semaphores: they give signals. The place you're most likely to have seen a semaphore is a railroad crossing: the gadget with moving arms is a semaphore. Some semaphores have mechanical arms, while others just use lights to communicate. A semaphore system can also use flags. In all cases, semaphores give visual signals that communicate something important, especially to people traveling.

Keep Reading on Vocabulary.com

Vocabulary lists containing semaphore

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

That meant learning semaphore to send messages during the day and Morse code for nighttime communications.

From Seattle Times ● May 30, 2024

And do we need so much semaphore to understand our relationships?

From Salon ● Jan. 2, 2024

We also found semaphore flags, a vastly outdated way to communicate between units.

From BBC ● Feb. 22, 2023

You’ve probably seen the semaphore system where years ago people in uniform waved handheld flags to convey messages.

From Washington Post ● Oct. 28, 2022

It’s more like a telegram, a verbal semaphore.

From "The Handmaid's Tale" by Margaret Atwood

Today, to help relative newcomers navigate potential April Fool’s foibles, our crack “Now & Then” team shares some quirky codes and stubborn semaphores from “Then” days that persist in the “Now.”

From Seattle Times ● Mar. 30, 2023

It undermines the piety and ethical lapses in nonfiction mystery shows, while sharing with “Three Billboards” a belief in semaphores and that people aren’t any one thing.

From New York Times ● Jan. 18, 2018

But he can slay without words: His eyebrows are semaphores, his left hand a weapon that can dismiss a subject with a quiver.

From Washington Post ● May 24, 2016

Witness the fact that mayoral candidates Zac Goldsmith and Sadiq Khan both sport similarly silver quiffs and it’s clear that grey hair no longer semaphores drabness within the political realm.

From The Guardian ● Feb. 4, 2016

Enrique's Journey Then he sees switches and semaphores.

From "Enrique's Journey" by Sonia Nazario

The start of today’s race has been semaphored and a group of six riders have attacked off the front of the bunch.

From The Guardian ● Jul. 11, 2019

With these ones ripped up and destroyed, and made into something else entirely, they perhaps semaphored a new era.

From The Guardian ● Sep. 9, 2014

Elsewhere in the opening episode nothing happened that wasn't first semaphored in the previous scene.

From The Guardian ● Feb. 27, 2011

As her advisers and courtiers semaphored behind her to wave off the truth, antiroyalist Hytner smiled sweetly and said, "It's hereditary."

From Time Magazine Archive

Maragon semaphored doubt by squeezing his eyebrows down in a scowl.

From Vigorish by John Berryman

Though we’re trying to connect, it feels like I’m standing on one side of a rushing river and she’s on the other, semaphoring her thoughts across at me.

From The Guardian ● Nov. 12, 2017

Even taskmaster Guardiola was spied clapping on the touchline at one point instead of being his usual manic semaphoring self.

From The Guardian ● Nov. 5, 2016

Apple employees may not talk much, but they’ve been semaphoring pretty furiously lately.

From Forbes ● Jul. 8, 2011

Seoul's black-marketeers went imperturbably about their chores, blowing their whistles and semaphoring energetically with their hands whenever a jeep or oxcart hove into sight.

From Time Magazine Archive

I half expected to see the few remaining insects circling him and semaphoring their romantic intentions.

From "The Evolution of Calpurnia Tate" by Jacqueline Kelly

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