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[ey-luh-ron] /ˈeɪ ləˌrɒn/
Aeronautics. a movable surface, usually near the trailing edge of a wing, that controls the roll of the airframe or effects maneuvers, as banks and the like.
a wall at the end of a roof with a single slope, as that of a church aisle.
Origin of aileron
1905-10; < French, equivalent to ail(e) (see aisle) + -eron diminutive suffix Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for aileron
  • One aileron is found at the outer trailing edge of each wing.
  • The hinged part found on the trailing edge of the wing is called the aileron.
  • The left aileron cables were found attached to the aileron sector, which was damaged with the stops in place.
  • aileron and rudder responses are shown along with the pilot rudder doublet inputs.
  • Deflection of an aileron control surface when flying at high dynamic pressure has two effects.
  • aileron-A control surface set into or near the wing tips, used to control the longitudinal axis or roll of the airplane.
  • The aileron controls were located along the trailing edge at the wing tips of the arrow-wing planform.
  • The tests revealed that aileron trim inputs resulted in a dramatic airplane-rolling tendency.
  • The airplane sustained substantial damaged to the fuselage, stabilizer, and right aileron.
  • The aileron however, is mounted at three points and must be accounted for.
British Dictionary definitions for aileron


a flap hinged to the trailing edge of an aircraft wing to provide lateral control, as in a bank or roll
Word Origin
C20: from French, diminutive of aile wing
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
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Word Origin and History for aileron

1909, from French aileron, altered (by influence of aile "wing"), from French aleron "little wing," diminutive of Old French ele "wing" (12c.), from Latin ala "wing" (see aisle).

Online Etymology Dictionary, © 2010 Douglas Harper
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aileron in Science
A hinged surface that is part of the back edge of each wing on an airplane. The ailerons are moved up or down to create uneven lift on the sides of the plane to control its rolling and tilting movements.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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