any movable airfoil, as a rudder, flap, or aileron, for guiding or controlling an aircraft or missile in flight.
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Question 1 of 9
You may have read the word "simmer" in a recipe or two, but what does it really mean?
Origin of control surface
First recorded in 1915–20
Words nearby control surface
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for control surface
a movable surface, such as a rudder, elevator, aileron, etc, that controls an aircraft or rocket
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012