Architecture .

a vault, having a circular plan and usually in the form of a portion of a sphere, so constructed as to exert an equal thrust in all directions.

a domical roof or ceiling.

a polygonal vault, ceiling, or roof.

any covering thought to resemble the hemispherical vault of a building or room

the great dome of the sky.

anything shaped like a hemisphere or inverted bowl.

(in a dam) a semidome having its convex surface toward the impounded water.

Crystallography . a form having planes that intersect the vertical axis and are parallel to one of the lateral axes.

Geology . upwarp.

Also called vistadome. Railroads . a raised, glass-enclosed section of the roof of a passenger car, placed over an elevated section of seats to afford passengers a full view of scenery.

Horology . an inner cover for the works of a watch, which snaps into the rim of the case.

a mountain peak having a rounded summit.

Slang . a person's head

I wish I could get the idea into that thick dome of yours.

to cover with or as if with a dome.

to shape like a dome.

to rise or swell as a dome.

noun

arcade , arch , bubble , bulge , covering , cupola , mosque , roof , span , top , vault , noddle , pate , poll , cap , ceiling