noun
plural roofs
[count] the cover or top of a building, vehicle, etc.
the top of the inside of a tunnel, cave, etc.
the top of the inside of your mouth
go through the roof
informal
to become very angry or upset
to rise to a very high level
hit the roof
raise the roof
informal :to make a lot of noise by playing music, celebrating, shouting, etc.
through the roof
chiefly US informal :at an extremely high level
verb
roofs; roofed; roofing
[+ obj] :to cover (something, such as a building) with a roof - often + over or in
US