1roof 
/ˈru:f/ noun
plural roofs /ˈru:f/ noun [count] 1 : the cover or top of a building, vehicle, etc.
▪ a shingle/slate/tile roof ▪ The roof is leaking. ▪ the roof of a car ▪ The roof of the old barn collapsed. ▪ We don't have much money, but at least we have a roof over our heads. [=at least we have somewhere to live] ▪ You'll do what I say as long as you're living under my roof. [=as long as you are living in my house] ▪ They all live under the same roof. [=in the same house] ▪ We hope to have sales and service under one roof [=at the same location] in the near future. — see also moonroof, sunroof 2 : the top of the inside of a tunnel, cave, etc. 3 : the top of the inside of your mouth
▪ He bit into a hot slice of pizza and burned the roof of his mouth.
▪ a shingle/slate/tile roof ▪ The roof is leaking. ▪ the roof of a car ▪ The roof of the old barn collapsed. ▪ We don't have much money, but at least we have a roof over our heads. [=at least we have somewhere to live] ▪ You'll do what I say as long as you're living under my roof. [=as long as you are living in my house] ▪ They all live under the same roof. [=in the same house] ▪ We hope to have sales and service under one roof [=at the same location] in the near future. — see also moonroof, sunroof
▪ He bit into a hot slice of pizza and burned the roof of his mouth.
go through the roof
informal 1 : to become very angry or upset
▪ When they realized he'd lied to them, his parents went through the roof. 2 : to rise to a very high level
▪ Sales of their new CD have gone through the roof.
▪ When they realized he'd lied to them, his parents went through the roof.
▪ Sales of their new CD have gone through the roof.
hit the roof — see 1hit
raise the roof
informal : to make a lot of noise by playing music, celebrating, shouting, etc.
▪ The crowd raised the roof when the winning goal was scored. ▪ His mother raised the roof when he came home late.
▪ The crowd raised the roof when the winning goal was scored. ▪ His mother raised the roof when he came home late.
through the roof
chiefly US, informal : at an extremely high level
▪ Ticket prices are through the roof.
▪ Ticket prices are through the roof.
— roof·less /ˈru:fləs/ adjective
▪ a roofless stadium
/ˈru:fləs/ adjective ▪ a roofless stadium
