(pl. roofs)
1- the structure forming the upper covering of a building or vehicle（建筑物或车辆的）顶, 顶部; 屋顶; 顶盖。
1.1
- the top inner surface of a covered area or space; the ceiling天花板; 车顶; 洞顶; 穹顶：
the roof of the cave fell in.
洞顶坍了下来。
1.2
- the upper limit or level of prices or wages（价格或工资的）最高限度, 上限：
starting salary £12,185, rising to a roof of £16,835.
起薪12,185英镑, 上限16,835英镑。
1.3
- used to signify a house or other building, especially in the context of hospitality or shelter房屋; 住处; 家; 栖身处：
helping those without a roof over their heads
帮助那些无家可归的人
they slept under the same roof.
他们同睡一屋。
with obj.(一般作be roofed)
1- cover with a roof给…盖上屋顶：
the yard had been roughly roofed over with corrugated iron.
院子将就地盖上了瓦楞铁屋顶。
1.1
- function as the roof of作为…的屋顶; 覆遮, 遮蔽：
fan vaults roof these magnificent buildings.
这些宏伟建筑的屋顶是扇形的穹顶。
短语
go through the roof
informal <非正式>
1
- (of prices or figures) reach extreme or unexpected heights（价格, 数目）涨到最高限度; 高得离谱; 突破上限。
2
- another way of saying hit the roof.同hit the roof.
hit（或go through）the roof
- informal suddenly become very angry〈非正式〉勃然大怒; 暴跳如雷。
raise the roof
- 见RAISE.
the roof of the world
- a nickname given to the Himalayas世界屋脊（喜马拉雅山的别称）。
派生词
roofless
adjective词源
Old 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.