1. ceiling, upper surface

usage: the overhead upper surface of a covered space; "he hated painting the ceiling"

2. ceiling, altitude, height

usage: (meteorology) altitude of the lowest layer of clouds

3. ceiling, roof, cap, control

usage: an upper limit on what is allowed; "he put a ceiling on the number of women who worked for him"; "there was a roof on salaries"; "they established a cap for prices"

4. ceiling, altitude, height

usage: maximum altitude at which a plane can fly (under specified conditions)

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See also: ceiling (Dictionary)