Plain English Meaning
A wobble or rocking motion where the aircraft keeps swinging past the position the pilot is trying to hold, then swinging back the other way.
Full Definition
A repeated back-and-forth movement around a central point or position. In flight training, oscillation refers to an aircraft repeatedly moving up and down, side to side, or rocking around a desired flight path or pitch attitude, typically caused by overcontrolling or delayed control corrections.
Context Anchor
Seen during practice landings when a student pilot overcorrects and the airplane starts moving above and below the intended landing path or nose-up and near the .