roof
[noun]
Synonyms: top, apex, crest, crown, fastigium, peak, summit, vertex
[verb]
Synonyms: harbor, chamber, haven, house, shelter, shield

[TahlilGaran] English Synonym Dictionary ▲

I. roof¹ S2 W2 /ruːf $ ruːf, rʊf/ noun [countable]
[Language: 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 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 raise¹(23), ⇒ sunroof

[TahlilGaran] Dictionary of Contemporary English ▲

II. roof² verb [transitive usually passive]
to put a roof on a building
be roofed with something
a cottage roofed with the local slate
roof something ↔ in/over phrasal verb British English
to cover an open space by putting a roof over it:
We’re going to roof in the yard to make a garage.

[TahlilGaran] Dictionary of Contemporary English ▲

roof
noun
ADJ. conical, flat, gabled, mansard, pitched, pointed, sloping, steep | corrugated iron, glass, slate, thatched, tiled, tin | car, church, etc.
VERB + ROOF support The roof is supported by stone columns.
ROOF + VERB slope The roof slopes down to the top of the windows.
cave in, fall in, collapse Five people were killed when the roof fell in.
leak
ROOF + NOUN space The burglars removed tiles to climb into the roof space.
covering, slate, tile | beams, rafters, structure, timbers | insulation | garden, terrace The hotel has a charming roof garden.
PREP. in a/the ~ There are small windows in the roof.
on a/the ~ There's a cat on the roof.
under your ~ (= in your house) I won't have that man under my roof again!
PHRASES under one/the same roof (= in the same building) We're good friends but we could never live under the same roof.

[TahlilGaran] Collocations Dictionary ▲

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.

[TahlilGaran] Collocations Dictionary ▲

roof
noun
BAD: In the bedroom, the roof looked very damp.
GOOD: In the bedroom, the ceiling looked very damp.
BAD: The bedroom roof was one huge mirror.
GOOD: The bedroom ceiling was one huge mirror.

Usage Note:
roof = the covering on top of a building that protects it from the weather: 'If the rain is coming in, there must be a hole in the roof.' 'All the rooves were covered in snow.'
ceiling = the surface of a room that is above your head: 'When he stands on tip-toe, he can almost touch the ceiling.'

[TahlilGaran] Dictionary of Common Errors ▲

roof
ru:f
See: hit the ceiling or hit the roof , raise the roof

[TahlilGaran] English Idioms Dictionary ▲