ear (Noun) — The sense organ for hearing and equilibrium.
ear (Noun) — Good hearing. ex. "he had a keen ear" ex. "a good ear for pitch"
ear (Noun) — The externally visible cartilaginous structure of the external ear.
ear (Noun) — Attention to what is said. ex. "he tried to get her ear"
ear (Noun) — Fruiting spike of a cereal plant especially corn.