Noun
(broadcasting) A combination of letters and numbers used to identify a radio or television station.
Synonym: call letters
(military) Any combination of characters or pronounceable words, which identifies a communication facility, a command, an authority, an activity, or a unit; used primarily for establishing and maintaining communications.
Synonym: (initialism) CS
call-sign (plural call-signs)
Alternative spelling of call sign
call-sign
A call sign can be any number of letters and numerals but each country must only use call signs that begin with the characters allocated for use in that country. Source: Internet
Airplanes * Air Force One is the radio call sign of any Air Force plane the President of the United States travels on. Source: Internet
Amateur radio and other activities Perens is an avid amateur radio enthusiast ( call sign K6BP citation ) and maintained technocrat. Source: Internet
Despite the threat of surface-to-air missiles (SAMs) and increasing visibility during the early morning hours of 31 January 1991, one AC-130H, AF Serial No. 69-6567, call-sign Spirit 03, opted to stay to continue to protect the Marines. Source: Internet
He was call sign Popoff 36 and, being named, took the flak and the fall, in the public mind, for the killing of Hull. Source: Internet
Harold J. Power On March 8, 1916, Harold Power with his radio company American Radio and Research Company (AMRAD), broadcast the first continuous broadcast in the world from Tufts University under the call sign 1XE (it lasted 3 hours). Source: Internet