7. (noun)ceiling, roof, cap an upperlimit 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"
8. (noun)crown, crownwork, jacket, jacket crown, cap (dentistry) dentalappliance consisting of an artificial crown for a broken or decayed tooth "tomorrow my dentist will fit me for a crown"