roof (roofs plural )
The plural can be pronounced [PH:r][PH:u][PH::][PH:f][PH:s] or [PH:r][PH:u][PH::][PH:v][PH:z].
1 n-count The roof of a building is the covering on top of it that protects the people and things inside from the weather.
...a small stone cottage with a red slate roof...
2 n-count The roof of a car or other vehicle is the top part of it, which protects passengers or goods from the weather.
The car rolled onto its roof, trapping him.
3 n-count The roof of your mouth is the highest part of the inside of your mouth.
the N of n
She clicked her tongue against the roof of her mouth.
4 If the level of something such as the price of a product or the rate of inflation goes through the roof, it suddenly increases very rapidly indeed.
INFORMAL
♦
go through the roof phrase V inflects
Prices for Korean art have gone through the roof.
5 If you hit the roof or go through the roof, you become very angry indeed, and usually show your anger by shouting at someone.
INFORMAL
♦
hit the roof/go through the roof phrase V inflects
Sergeant Long will hit the roof when I tell him you've gone off.
6 If a group of people inside a building raise the roof, they make a very loud noise, for example by singing or shouting.
♦
raise/lift the roof phrase V inflects
He raised the roof at the conference when he sang his own version of the socialist anthem, The Red Flag.
7 If a number of things or people are under one roof or under the same roof, they are in the same building.
♦
under one roof/under the same roof phrase PHR after v, v-link PHR
The firms intend to open either together under one roof or alongside each other in shopping malls...