dome

Concise Oxford English Dictionary © 2008 Oxford University Press:
dome/dəʊm/

▶noun

• 1 a rounded vault forming the roof of a building or structure.

  ■ the revolving openable hemispherical roof of an observatory.

• 2 the rounded summit of a hill or mountain.

  ■ Geology a rounded uplifted landform or underground structure.

• 3 informal the top of the head.

• 4 literary a stately building.

▶verb (often as noun doming) form a rounded shape.

– derivatives
domed adjective,
dome-like adjective.

– origin C16: from Fr. dôme, from Ital. duomo ‘cathedral, dome’, from L. domus ‘house’.