CEILING

noun Etymology: Middle English celing, from celen Date: 1535 1. the overhead inside lining of a room, material used to ceil a wall or roof of a room, something thought of as an overhanging shelter or a lofty canopy , 3. the height above the ground from which prominent objects on the ground can be seen and identified, the height above the ground of the base of the lowest layer of clouds when over half of the sky is obscured, 4. absolute ~ , service ~ , an upper usually prescribed limit , ~ed adjective