noun
: a hinged flap attached to the upper surface of a wing of an airplane usually at the trailing edge to be raised for lateral control or to the lower surface of a wing to be deflected downward for giving increased lift and drag
noun
: a hinged flap attached to the upper surface of a wing of an airplane usually at the trailing edge to be raised for lateral control or to the lower surface of a wing to be deflected downward for giving increased lift and drag
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012