Ceil·ing, n.
 1. Arch. (a) The inside lining of a room overhead; the under side of the floor above; the upper surface opposite to the floor. (b) The lining or finishing of any wall or other surface, with plaster, thin boards, etc.; also, the work when done.
 2. Naut. The inner planking of a vessel.
 Camp ceiling. See under Camp.
 Ceiling boards, Thin narrow boards used to ceil with.

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