Open English Wordnet
Nouns
(n)ceilingthe overhead upper surface of a covered space“he hated painting the ceiling” (n)ceiling(meteorology) altitude of the lowest layer of clouds (n)ceiling, roof, capan 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” (n)ceilingmaximum altitude at which a plane can fly (under specified conditions)