roof

a protective covering that covers or forms the top of a building

protective covering on top of a motor vehicle

the inner top surface of a covered area or hollow space; "the roof of the cave was very high"; "I could see the roof of the bear's mouth"

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"

provide a building with a roof; cover a building with a roof