Meaning

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

noun protective covering on top of a motor vehicle

noun the inner top surface of a covered area or hollow space

originFrom Middle English rof, from Old English hrōf (“roof, ceiling; top, summit; heaven, sky”), from Proto-Germanic *hrōfą (“roof”). Cognate with Scots ruif (“roof, ceiling”), Dutch roef (“cabin on a boat”), Icelandic hróf (“shed”), Irish cró (“pen, barn, cabin”), Proto-Slavic *stropъ (“roof, ceiling”). Compare Faroese rógv (“something high up”).

Etymology from Wiktionary, CC BY-SA 3.0