What does the term "stall" mean in aviation?

The term "stall" in aviation refers to a condition where an aircraft cannot generate enough lift to sustain flight, typically occurring when the angle of attack exceeds a critical threshold. During a stall, the airflow over the wings becomes turbulent and separated, leading to a significant reduction in lift. This can happen at various speeds and configurations, not just during slow flight. Pilots are trained to recognize the signs of an impending stall, such as a decrease in control effectiveness or buffet, and to execute recovery procedures to restore normal flight conditions.

Understanding this concept is critical for safe flying, as stalling may occur during takeoff, landing, or even in level flight if the aircraft is not managed properly. The comprehensive understanding of stalls is central to a pilot's training and performance, emphasizing the importance of maintaining appropriate speed and control of the aircraft's angle of attack during all phases of flight.