Definition of "callsign" [callsign]

• Alternative spelling of call sign. (noun)

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• "His callsign is The Postman because he is our unit mail clerk."
• "Nighthawks was name for 131 AVN Co., no record of a Delta 52, but that could have been an aircraft callsign."
• ""If not for the government rule restricting airlines that are less than five years old from flying overseas, 6E [the IndiGo callsign], would already be doing it," he said."