artistic pictures

A wing is a surface used to produce lift for flight through the atmosphere - or occasionally through another gaseous or fluid substance. Another word for an artificial wing is an airfoil, and airfoils always have a distinctive cross-sectional shape.
The word "wing" for many centuries (reportedly) referred only to the foremost limbs of birds, but the meaning of "wing" has been extended in recent centuries to include the wings of insects, bats, pterosaurs, and aircraft.