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).

The highest altitude at which an aircraft may fly due to physical factors, such as low air density.

A fan fixture attached to a ceiling, sometimes with a built-in light.

Alternative form of hit the roof

plural of tray ceiling

(architecture) A tray-shaped recess in a ceiling.

Especially in America, a social barrier to further promotion or progression, in employment and elsewhere, for a person of East Asian ethnicity.

An informal (and often unacknowledged) barrier to promotion or advancement, in employment and elsewhere, for middle-aged and elderly people.

A secondary ceiling, suspended from above, used to conceal wiring, plumbing and ducts

A dropped ceiling