noun the top of the spire of the cochlea of the ear.
2. cupola ·noun a revolving shot-proof turret for heavy ordnance.
3. cupola ·noun a small structure standing on the top of a dome; a lantern.
4. cupola ·noun a furnace for melting iron or other metals in large quantity, used chiefly in foundries and steel works.
5. cupola ·noun a roof having a rounded form, hemispherical or nearly so; also, a ceiling having the same form. when on a large scale it is usually called dome.