A shell-shaped structure, especially the external ear or a part of the nasal cavity. The doctor examined the concha of the patient's ear for any signs of infection.
A type of Mexican sweet bread that is shaped like a shell and often topped with a sugary crust. I bought a concha from the bakery to have with my morning coffee.
In classical architecture, a half-dome or semi-dome, especially that which covers the apse of a church. The basilica’s apse was crowned by an ornately painted concha.