1. (n.) 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.

2. (n.) A small structure standing on the top of a dome; a lantern.

3. (n.) A furnace for melting iron or other metals in large quantity, -- used chiefly in foundries and steel works.

4. (n.) A revolving shot-proof turret for heavy ordnance.

5. (n.) The top of the spire of the cochlea of the ear.

antenna tower apse arcade arcature arch arched roof archway barbican belfry bell tower camber campanile ceilinged roof colossus column concameration concha cove derrick dome fire tower geodesic dome igloo keystone lantern lighthouse martello martello tower mast minaret monument obelisk observation tower ogive pagoda pilaster pillar pinnacle pole pylon pyramid shaft skewback skyscraper span spire standpipe steeple stupa television mast tope tour tower turret vault vaulting voussoir water tower windmill tower