/ru:f ||; ruf/noun [C] (
plural roofs)
1 the part of a building, vehicle, etc which covers the top of it （楼房、车辆等的）顶部: a flat/sloping/tiled roof 平╱斜╱瓦屋顶the roof of a car 车顶The library and the sports hall are under one roof (= in the same building). 图书馆和运动馆在同一座楼房里。 ☞pictures at car and on page C7 见car及C7页插图
2 the highest part of the inside of sth （某物内部的）最高部份: The roof of the cave had collapsed. 洞顶已经塌下来了。The soup burned the roof of my mouth. 这汤灼痛我的上颌。
a roof over your head somewhere to live 栖身之所:
I might not have any money, but at least I've got a roof over my head. 我或许没有钱，但至少我还有个栖身之所。