Topic: CONSTRUCTION
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| Language: | Old English |
| Origin: | hrof |
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roof1 S3 W2
[countable]
[countable]1TB the structure that covers or forms the top of a building, vehicle, tent etc : 
They finally found the cat up on the roof.a flat roof
They finally found the cat up on the roof.a flat roof2TBC the top of a passage under the ground : Suddenly, the whole tunnel roof caved in.
Suddenly, the whole tunnel roof caved in.3 somewhere to live : I may not have a job, but at least I've got a roof over my head.
a roof over your head
DHHI may not have a job, but at least I've got a roof over my head.4
go through the roof
informala) also hit the roof to suddenly become very angry : Put that back before Dad sees you and hits the roof!
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
6 in the same building or home : Here you can buy food, clothes, and electrical goods all under one roof.
under the same roof/under one roof
Here you can buy food, clothes, and electrical goods all under one roof.8 if the roof falls in or caves in, something bad suddenly happens to you when you do not expect it
