Ceiling

1. p. pr. & vb. n. of Ceil
2. v. t. The inside lining of a room overhead; the under side of the floor above; the upper surface opposite to the floor.
3. v. t. The lining or finishing of any wall or other surface, with plaster, thin boards, etc.; also, the work when done.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.