This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. The upper interior surface of a room.

n. Material used to cover this surface.

n. Something resembling a ceiling: a ceiling of leaves over the arbor.

n. An upper limit, especially as set by regulation: wage and price ceilings.

n. The highest altitude under particular weather conditions from which the ground is still visible.

n. The altitude of the lowest layer of clouds.

n. Absolute ceiling.

n. Nautical The planking applied to the interior framework of a ship.

n. The surface that bounds the upper limit of a room.

n. The upper limit of an object or action.

n. The highest altitude at which an aircraft may fly.

n. The smallest integer greater than or equal to a given number.

v. Present participle of ceil.

n.

n. The inside lining of a room overhead; the under side of the floor above; the upper surface opposite to the floor.

n. The lining or finishing of any wall or other surface, with plaster, thin boards, etc.; also, the work when done.

n. The inner planking of a vessel.

n. A canopy; hangings; properly, hangings overhead, but by extension also side-hangings; tapestry.

n. The interior overhead surface of an apartment, usually formed of a lining of some kind affixed to the under side of joists supporting the floor above, or to rafters; the horizontal or curved surface of an interior, opposite the floor. In ordinary modern buildings it is usually finished with or formed of lath-and-plaster work.

n. Wainscoting; wainscot.

n. The lining of planks on the inside of a ship's frame.

n. maximum altitude at which a plane can fly (under specified conditions)

n. (meteorology) altitude of the lowest layer of clouds

n. an upper limit on what is allowed

n. the overhead upper surface of a covered space

"The term "ceiling" is supposed to be exactly that; a ceiling. jgg."

floor   

height    altitude   

groined ceiling    cofferwork ceiling    ceiling-joists    metallic ceiling    compartment ceiling   

roof    hit the ceiling    floor    flight ceiling    glass ceiling   

ceil    roof    plafond    cupola   

ceil   

Darjeeling    Ealing    Wheeling    annealing    appealing    concealing    dealing    feeling    healing    heeling   

ceil    cornice    woodwork    chandelier    carving    balcony    furnishings    staircase    fresco    balustrade