Plain English Meaning
The exact words controllers use when telling a pilot what to do with the transponder. Each phrase has one specific meaning so there is no guessing about what the controller wants.
Full Definition
The standard set of words and instructions used by air traffic controllers when communicating with pilots about transponder operation. It includes specific terms such as 'squawk' (set this transponder code), 'ident' (press the IDENT button so the aircraft's return is highlighted on the controller's scope), 'stop squawk' (turn the transponder off or to standby), and 'squawk standby' (set the transponder to the standby position). These phrases give controllers a precise, unambiguous way to direct pilots in operating the transponder portion of the ATC Radar .