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control surface

noun

any movable airfoil, as a rudder, flap, or aileron, for guiding or controlling an aircraft or missile in flight.

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To stew in a sauce for a long time.
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Origin of control surface

First recorded in 1915–20

Words nearby control surface

control point, control rocket, control rod, control room, control stick, control surface, control survey, control syringe, control tower, control unit, control variable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for control surface

control surface

noun

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