ceiling

noun

• 1the upper interior surface of a room or other similar compartment: the books were stacked from floor to ceiling

• 2an upper limit set on prices, wages, or expenditure:the government imposed a wage ceiling of 3 per cent

• 3the maximum altitude that a particular aircraft can reach: the aircraft’s quoted ceiling of 24,000 feet
• the altitude of the base of a cloud layer.

• 4 Nautical the inside planking of a ship’s bottom and sides.