noun.
Either of two movable flaps on the wings of an airplane that can be used to control the plane's rolling and banking movements.
The Century Dictionary and Cyclopedia
noun.
Same as ailette.
noun.
In architecture, that piece of the end wall, as of nave or transept, which covers the end of the aisle-roof. It resembles a wing of the main or central structure.
the GNU version of the Collaborative International Dictionary of English
noun.
A half gable, as at the end of a penthouse or of the aisle of a church.
noun.
A small plane or surface capable of being manipulated by the pilot of a flying machine to control lateral balance; a hinged wing tip; a lateral stabilizing or balancing plane.