roof

roof¹ W2S3 [ru:f US ru:f, ruf] n

↑chimney, ↑gutter

[: Old English; Origin: hrof]

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 AmE if the roof falls in or caves in, something bad suddenly happens to you when you do not expect it

→raise the roof at ↑raise¹ (23), ↑sunroof

roof ²

roof² v [T usually passive]

to put a roof on a building

be roofed with sth

▪ a cottage roofed with the local slate

roof in/over [roof sth<=>in/over] phr v

to cover an open space by putting a roof over it

▪ We're going to roof in the yard to make a garage.