1. movable control surfaces on the trailing edge of an aircraft's wings that control roll movement
Usage: aviation; plural form of aileron

Examples

• The pilot moved the control stick to adjust the ailerons during the turn.
• When one aileron goes up, the other goes down to make the plane roll.
• The aircraft's ailerons were damaged in the storm and needed repair.
• Flight instructors teach students how ailerons control the plane's banking motion.
• The mechanic inspected the ailerons before the plane's departure.
• Modern jets have sophisticated aileron systems for precise flight control.