"roofs" in the noun sense
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"
4. ceiling, roof, cap
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"
"roofs" in the verb sense
provide a building with a roof cover a building with a roof
Source: WordNet® (An amazing lexical database of English)
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