noun An appendage of an animal's (bird, bat, insect) body that enables it to fly.
The bird was flapping its wings
noun A fin at the side of a ray or similar fish.
noun Human arm.
noun Part of an aircraft that produces the lift for rising into the air.
I took my seat on the plane, overlooking the wing.
noun One of the large pectoral fins of a flying fish.
noun One of the broad, thin, anterior lobes of the foot of a pteropod, used as an organ in swimming.
noun Any membranaceous expansion, such as that along the sides of certain stems, or one of the bracts on a dragon fruit, or of a fruit of the kind called samara.
noun Either of the two side petals of a papilionaceous flower.