noun
definition
The overhead closure of a room.
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The upper limit of an object or action.
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(aviation) The highest altitude at which an aircraft can safely maintain flight.
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(meteorology) The measurement of visible distance from ground or sea level to an overcast cloud cover; under a clear sky, the ceiling measurement is identified as "unlimited."
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(mathematics) The smallest integer greater than or equal to a given number.
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(nautical) The inner planking of a vessel.
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(finance) The maximum permitted level in a financial transaction.
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(architecture) The overhead interior surface that covers the upper limits of a room.