- any movable airfoil, as a rudder, flap, or aileron, for guiding or controlling an aircraft or missile in flight.
Origin of control surface
First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a movable surface, such as a rudder, elevator, aileron, etc, that controls an aircraft or rocket