Definition of aileron in English:


Syllabification: ai·ler·on
Pronunciation: /ˈāləˌrän


A hinged surface in the trailing edge of an airplane wing, used to control lateral balance.
More example sentences
  • Each wing has a single aileron surface on the trailing edge to control roll and two flaps to control lift and drag.
  • The other intuitive reaction is to attempt to roll the aircraft with ailerons to level the wings.
  • Put the palm of your hand against the bottom of the leading edge of the aileron at each hinge and push up.


early 20th century: French, literally 'small wing'.

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