roof 1 S2 W2 / ruf $ ruf, rʊf / 名词 [可数名词]

1 the structure that covers or forms the top of a building, vehicle, tent etc :

They finally found the cat up on the roof.

roof of

We can probably strap the cases to the roof of her car.

slate/tiled/thatched etc roof

a flat roof

a pitched roof (= sloping roof )

red-roofed/metal-roofed etc

a wooden-roofed theatre

2 the top of a passage under the ground :

Suddenly, the whole tunnel roof caved in.

3 a roof over your head somewhere to live :

I may not have a job, but at least I’ve got a roof over my head.

4 go through the roof informal

a) ( also hit the roof ) to suddenly become very angry :

Put that back before Dad sees you and hits the roof!

b) if a price, cost etc goes through the roof, it increases to a very high level

5 the roof of sb’s mouth the hard upper part of the inside of your mouth

6 under the same roof/under one roof in the same building or home :

If we’re going to live under the same roof , we need to get along.

Here you can buy food, clothes, and electrical goods all under one roof.

7 under sb’s roof spoken in your home :

As long as you live under my roof, you’ll do as I say.

8 the roof falls/caves in informal especially American English if the roof falls in or caves in, something bad suddenly happens to you when you do not expect it

→ raise the roof at raise 1 ( 23 ) , → sunroof

COLLOCATIONS

ADJECTIVES/NOUN + roof

a flat roof She used to sunbathe on the flat roof.

a sloping roof The path led to a log cabin with a chalet-style sloping roof.

a pitched roof (= with parts that slope down ) a row of garages with tiled pitched roofs.

a tiled roof (= covered with pieces of baked clay )

a slate roof (= covered with thin pieces of a grey rock )

a thatched roof (= made of dried straw ) She lived in a pretty country cottage with a thatched roof.

a leaky/leaking roof (= one that lets rain in ) We needed to fix the leaky roof.