Plain English Meaning
A stall the pilot did not mean to enter. The wing stops producing enough lift because the pilot, usually distracted, let the aircraft slow down or pitch up too far without noticing.
Full Definition
An aerodynamic stall that occurs unintentionally, typically when the pilot's attention is diverted and the aircraft is allowed to reach a critical angle of attack without the pilot recognizing it in time to prevent it.
Context Anchor
Seen in flight training, especially during distraction exercises, slow flight practice, turns, approach work, and any where the pilot’s attention is divided.