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the structure that covers or forms the top of a building or vehicle 顶部；屋顶；车顶 
a flat/sloping/pitched roof 平的/倾斜的/倾斜的屋顶 Offices on the upper floors have access to a roof terrace. 楼上的办公室有通往屋顶平台的通道。 a tin/slate/tiled/thatched roof 铁皮/石板/瓷砖/茅草屋顶 The corner of the classroom was damp where the roof had leaked. 教室漏雨的一角是湿的。 Tim climbed on to the garage roof. 蒂姆爬到车库的房顶上。 The roof of the car was not damaged in the accident. 事故中，车顶没有遭到损坏。 Offices on the upper floors have access to a roof terrace. 楼上的办公室有通往屋顶平台的通道。 We stepped out onto the roof of the building. 我们走上大楼的屋顶。 I have solar panels on my roof. 我的屋顶上有太阳能电池板。
Extra ExamplesTopics Houses and homesa2, Transport by car or lorrya2, Buildingsa2Five people were killed when the roof fell in. 屋顶坍塌，5 人死亡。 The burglars removed tiles to climb into the roof space. 入室盗窃者揭开屋瓦爬进了阁楼。 The roof is supported by stone columns. 屋顶由石柱支撑。 The roof slopes down to the top of the windows. 屋顶倾斜延伸到窗户上方。 The roof was covered with red clay tiles. 屋顶铺的是红陶瓦。 There are small windows in the roof. 屋顶上有几个小窗户。 There's a cat on the roof. 屋顶上面有一只猫。
Oxford Collocations Dictionaryadjective- conical
- flat
- gabled
- …
- support
- cover
- slope
- cave in
- collapse
- …
- space
- covering
- slate
- …
- in a/the roof
- on a/the roof
- under your roof
- …
- under one roof
- under the same roof
- -roofed
(in adjectives 构成形容词 having the type of roof mentioned 有…顶的 flat-roofed buildings 平顶的大楼
the top of an underground space such as a tunnel or cave 洞顶；隧道顶 The roof of the tunnel was starting to collapse. 隧道的顶部开始坍塌。 The cave had a very low roof. 这个洞穴的屋顶很低。
- roof of your mouth
the top of the inside of your mouth 口腔顶部；腭部
Word OriginOld English hrōf, of Germanic origin; related to Old Norse hróf ‘boat shed’, Dutch roef ‘deckhouse’. English alone has the general sense ‘covering of a house’; other Germanic languages use forms related to thatch.
Idioms
go through the roof
(of prices, etc. 价格等 to rise or increase very quickly 飞涨；激增 House prices here have gone through the roof. 这里房价已经暴涨。
- (also hit the roof)(informal)
to become very angry 非常生气；暴怒
have a roof over your head
to have somewhere to live 有栖身之所 Thanks to Bob’s generosity, I still have a roof over my head. 由于鲍勃的慷慨，我现在仍有一个栖身之所。
like a cat on a hot tin roof
(British English also like a cat on hot bricks)
very nervous 非常生气；暴怒 She was like a cat on a hot tin roof before her driving test. 她在驾驶考试前就像热锅上的蚂蚁。
raise the roof
to produce or make somebody produce a lot of noise in a building, for example by shouting or cheering （在屋内）大声喧闹，闹翻天 Their cheers raised the roof. 他们的欢呼声响彻云霄。
under one roof | under the same roof
under your roof