Plain English Meaning

Rolling the airplane from level flight into a banked turn.

Full Definition

The act of moving the airplane from wings-level flight into a bank by applying coordinated aileron and rudder inputs to begin a turn.

Context Anchor

Seen in level-turn training when moving from straight-and-level flight into an established left or right turn.

Derivation

Plain English compound from 'roll' (rotation about the airplane's longitudinal axis) and 'in' (entering the turn). 'Roll-in' is the ; '' is the exit.