What is the definition of lift in aerodynamics?

The definition of lift in aerodynamics is accurately described as the aerodynamic force that acts perpendicular to the relative wind. Lift is generated due to the pressure difference between the upper and lower surfaces of an airfoil, caused by the shape of the wing and the angle at which it meets the oncoming airflow. This pressure differential results in a force that provides the upward motion necessary for an aircraft to ascend or maintain altitude.

Understanding lift is crucial for pilots and aerodynamics as it directly affects an aircraft's ability to fly. When the lift generated by the wings is greater than the weight of the aircraft, it results in climbing. On the other hand, when lift is less than the weight, the aircraft descends. Thus, the role of lift is central to the principles of flight and aircraft design, emphasizing its relationship with the flow of air around the wings.