1. A mansion or stately building: The archaic term dome refers to an imposing edifice with a rounded vault forming the roof, typically with a circular base.
2. Etymology: from Latin domus, "house"; from Greek doma, "housetop, house, temple".

A spherical or partial-spherical shell structure or lattice shell based on a network of great circles (geodesics) positioned on the surface of a sphere: A geodesic dome is a strong prefabricated enclosure constructed of lightweight bars forming a grid of polygons, with no internal supports.

A geodesic dome is energy efficient because it requires less building material and has less surface area, because heat loss due to wind turbulence is decreased, and because its shape minimizes air leakage.

A dome or anticlinal fold (inclining downward on both sides from a median line or axis, as a fold of rock strata) originating from a thick bed of salt up to five miles deep below the earth's surface.

The domes push their way up through more brittle overlying rocks, are roughly circular, and average up to one to two miles in diameter. The tops of these domes can be commercially mined for salt.

A steep-sided, rounded mass of viscous lava forming a dome-shaped or bulbous mass over a volcanic vent.