Plain English Meaning
Spotting, from the instruments, that the aircraft is pitched or banked in a way you did not intend, so you can react quickly.
Full Definition
The skill of identifying, primarily through instrument indications, that the aircraft has entered a pitch or bank attitude that was not intended and that is outside the range used for normal flight. Recognition relies on cross-checking the attitude indicator together with the airspeed indicator, altimeter, vertical speed indicator, and turn indicator for telltale signs such as rapidly changing airspeed, large altitude deviations, , and , so that can be initiated promptly and in the correct sequence.