call-sign
Definition
- Noun:
- A unique identifier: A "call sign" is a distinctive combination of letters, numbers, or words assigned to a radio station, aircraft, ship, or individual (such as a pilot or military operator) for identification purposes in communication.
- A code name: In military or emergency contexts, a "call sign" may be a code name used to refer to a person, unit, or operation to maintain security or clarity.
Usage Examples
- (The pilot used his assigned identifier to communicate with air traffic control.)
- (The ship's unique radio code was transmitted for identification.)
- (The commander's code name was used to maintain operational security.)
Advanced Usage
"to have a call sign": to be assigned a specific identifier for communication.
- Every amateur radio operator must have a call sign registered with the government. (Each hobbyist must possess a unique licensed identifier.)
"to use a call sign": to employ the identifier in transmissions.
- The spy used a false call sign to avoid detection. (The agent employed a deceptive code name.)
Variants and Related Words
Callsign (n): an alternative spelling of "call sign," common in informal or technical writing.
- The military unit's callsign was changed for the new operation. (The unit's identifier was updated.)
Sign (n): a general indicator or mark, not specific to radio communication.
- The sign on the door said "Exit." (A visual marker indicating direction.)
Synonyms
- Identifier: a name or code that uniquely identifies something.
- Code name: a secret or official name used to refer to a person or mission.
- Handle: (informal) a nickname or pseudonym used in radio communication, especially among amateur operators.
Related Idioms
- "Call sign" does not have common idioms, but it is often used in technical jargon.
- He answered to his call sign, "Raven," during the drill. (He responded to his assigned identifier.)