call sign


Definition of call sign

: the combination of identifying letters, letters and numbers, or words assigned to an operator, office, activity, vehicle, or station for use in communication (as in the address of a message sent by radio)

Examples of call sign in a Sentence

Recent Examples on the Web Those deputies were marked by a special call sign for emergency dispatchers, according to an internal memo seen by NBC News. NBC News, "'Live PD' was canceled. But in one Texas county, its twisted legacy lives on," 11 Oct. 2020 At press time, one E-6B, call sign CLOSE21, was flying just north of Dallas. Kyle Mizokami, Popular Mechanics, "The Real Reason Why the Pentagon’s Nuclear Command Jet Recently Launched," 6 Oct. 2020 Kuo posts as @ai6yrham (a nod to his ham radio call sign), one of a handful of amateur scanner accounts on Twitter, including the very popular @CAFireScanner. Ryan Kost,, "When blazes spark, ‘Fire Twitter’ heats up," 3 Oct. 2020 The expert pilot, call sign Banger, a graduate of the prestigious Air Force Weapons School, was up against a computer program that uses artificial intelligence algorithms to think, react, and shoot with superhuman ability. Jamie Mcintyre, Washington Examiner, "An algorithm for a wingman: The coming robot revolution in future wars," 17 Sep. 2020 The vast majority of the story takes place onboard the USS Keeling (call sign Greyhound), with all the claustrophobia and vastness that implies: cramped, panicky quarters; grey and roiling seas. Leah Greenblatt,, "Tom Hanks is the captain now in tense WWII naval drama Greyhound: Review," 6 July 2020 The helmet has eagle stickers on each side and Cruise's Maverick call sign written across the front and the back. David Williams, CNN, "You can buy a Tom Cruise 'Top Gun' helmet, but it will set you back more than $65,000," 26 Aug. 2020 Heron’s agent defeated the human (call sign, Banger) by five to zero. Rob Verger, Popular Science, "Watch a computer clobber a human pilot in a simulated fighter jet duel," 21 Aug. 2020 After 19 hours in orbit, the astronauts docked with the ISS and reunited with fellow astronaut Chris Cassidy—whose ham call sign is KF5KDR, by the way—and Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. Jennifer Leman, Popular Mechanics, "Did a Ham Radio Enthusiast Actually Speak to Crew Dragon?," 5 June 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'call sign.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of call sign

1907, in the meaning defined above

Keep scrolling for more

Learn More about call sign

Time Traveler for call sign

Time Traveler

The first known use of call sign was in 1907

See more words from the same year

Statistics for call sign

Last Updated

24 Oct 2020

Cite this Entry

“Call sign.” Dictionary, Merriam-Webster, Accessed 1 Dec. 2020.

Keep scrolling for more

More Definitions for call sign

call sign


English Language Learners Definition of call sign

: a combination of letters and numbers that is used to identify someone or something in a radio broadcast

Comments on call sign

What made you want to look up call sign? Please tell us where you read or heard it (including the quote, if possible).


Test Your Vocabulary

Musical Words Quiz

  • gramophone
  • Which word describes a musical performance marked by the absence of instrumental accompaniment?
Spell It

Can you spell these 10 commonly misspelled words?

Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!