Dome is a rounded vault forming the roof of a building or structure, typically with a circular base.
In geology, a dome is a deformational feature consisting of symmetrically-dipping anticlines.
Slang meanings of dome include:
1. The human head (e.g., "I got hit on the dome")
2. A protective cover (e.g., "Put the dome on the cake")
3. In sports, a stadium with a domed roof