What does the term "stall" refer to in flight?

The term "stall" in flight specifically refers to a condition where the airflow over the wings of an aircraft separates, which results in a significant loss of lift. This phenomenon usually occurs when the angle of attack (the angle between the wing and the oncoming airflow) exceeds a critical point. In this scenario, the smooth airflow over the wing is disrupted, leading to a decrease in lift and potentially causing the aircraft to descend or lose altitude.

Understanding this concept is crucial, as recognizing the signs of an impending stall can help pilots take corrective actions, such as reducing the angle of attack or increasing power, to recover and ensure safe flight operations. This definition of a stall highlights the importance of maintaining proper flight parameters to avoid this critical situation during flight.