An informal (and often unacknowledged) barrier to promotion or advancement, in employment and elsewhere, for gay and lesbian people.

The location above the surface of the Earth where the lowest layer of clouds are reported as broken, overcast or obscuration (as opposed to thin or partial).

plural of brass ceiling

(idiomatic) An unwritten, uncodified barrier to promotion or progression for women in law enforcement or the military.

The top inside part of a room.