Definition of: cupola

(ky′pə·lə) noun
1. A dome; hemispherical roof.
2. Archit. Any small structure above the roof of a building.
3. A turret on an armored ship.
4. The small hatch in the turret of certain military tanks.
5. Metall. A shaft furnace used for melting iron, especially that for foundry use.
6. Geol. The domelike protuberance on the roof of a batholith, a possible reservoir for magma.
—v.t. ·laed, ·la·ing To provide with a cupola. [<Ital. <L cupula, dim. of cupa tub, cask]