dome

noun

• 1a rounded vault forming the roof of a building or structure, typically with a circular base:the dome of St. Paul’s Cathedral
• the revolving openable hemispherical roof of an observatory.
• [in names] a sports stadium with a domed roof.

• 2a thing shaped like a dome, in particular.
• the rounded summit of a hill or mountain:the great dome of Mont Blanc
• a natural vault or canopy, such as that of the sky or trees:the dome of the sky
• Geology a rounded uplifted landform or underground structure.
• informal the top of the head:a content face topped by a shaved dome

• 3 literary a stately building.

verb

• cover with or shape as a dome:a domed stadium
• [no object] (often as noun doming) (of stratified rock or a surface) become rounded in formation; swell.