airfoil Hear it!

airfoil definition

☆ air·foil (-fo̵il′)

noun

  1. a part with a flat or curved surface, as a wing, rudder, etc., specifically designed to keep an aircraft up or control its movements by reacting to the air through which it moves
  2. a similar winglike surface designed to improve stability for high-speed cars and boats; spoiler

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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