dome

Short definition from Wiktionary

Noun

1. 1
   A structural element resembling the hollow upper half of a sphere.
2. 2
   Anything shaped like an upset bowl, often used as a cover.
3. 3
   A person's head.
4. 4
   head, oral sex
5. 5
   A building; a house; an edifice.
6. 6
   Any erection resembling the dome or cupola of a building, such as the upper part of a furnace, the vertical steam chamber on the top of a boiler, etc.
7. 7
   A prism formed by planes parallel to a lateral axis which meet above in a horizontal edge, like the roof of a house; also, one of the planes of such a form.
8. 8
   A geological feature consisting of symmetrical anticlines that intersect where each one reaches its apex.
9. 9
   A press stud or snap fastener.

Verb

1. 1
   To give a domed shape to.
2. 2
   To shoot in the head.
3. 3
   To perform fellatio on.

Proper noun

1. 1
   A surname.