Plain English Meaning

When an aircraft is in a steep turn, it wants to keep rolling more and more into the turn on its own. The pilot has to actively hold the wings against the roll to keep the bank steady.

Full Definition

The tendency of an aircraft in a steep turn to continue rolling into a steeper bank without further control input from the pilot. This occurs because the outer wing, traveling on a larger radius, moves faster through the air than the inner wing, generating more lift on the outside of the turn and rolling the aircraft further into the bank.

Context Anchor

Seen during instrument turns, especially while maintaining a standard-rate turn by reference to flight instruments.