Definify.com
Webster 1913 Edition
Ceiling
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.
Webster 1828 Edition
Ceiling
CEILING
,ppr.
CEILING
,Noun.
1.
The covering which overlays the inner roof of a building, or the timbers which form the top of a room. This covering may be of boards, or of lath and plastering. Hence ceiling is used for the upper part of a room.2.
In ship building, the inside planks of a ship.