Which of the following definitions best captures what "trailing edge" means?

The term "trailing edge" refers specifically to the back edge of a wing, where the airflow exits after interacting with the airfoil. This is critical to understanding the aerodynamics of wings, as the design and shape of the trailing edge significantly influence the airflow patterns, lift, and drag characteristics of the aircraft. The effective design of the trailing edge can enhance performance by controlling how the air separates from the wing at the back, impacting overall stability and efficiency. Knowing that the trailing edge is positioned at the rear distinguishes it from other parts of the wing, such as the leading edge, which is the front edge where air initially meets the wing. The other options refer to components of the wing but do not correctly define the trailing edge, demonstrating the importance of precision in terminology within aerodynamics.