Noun: callsign 'kol,sIn
- (military) a tune, name, message, code, or words that identify someone sending or receiving a broadcast message
"The pilot used her callsign to identify herself to air traffic control";
- call sign
- (broadcasting) a combination of letters used to identify a radio or television station
"The local radio station's callsign was WXYZ";
- call sign
Derived forms: call signs, callsigns
Encyclopedia: Callsign