Plain English Meaning
Using the rudder pedals at the right time and in the right amount so the airplane turns and flies smoothly, without sliding sideways through the air.
Full Definition
The correct application of rudder pressure in combination with aileron input to keep the airplane's longitudinal axis aligned with its flight path, preventing slipping or skidding during turns, takeoffs, climbs, and other maneuvers.
Context Anchor
Encountered during takeoff, turns, climbs, descents, slow flight, and any maneuver where the airplane may tend to or right.