roof
 
roof
 (rf, rf) noun
1.
	a. The exterior surface and its supporting structures on the top of a building. b. The upper exterior surface of a dwelling as a symbol of the home itself: three generations living under one roof.
2.	The top covering of something: the roof of a car. 
3.	The upper surface of an anatomical structure, especially one having a vaulted inner structure: the roof of the mouth. 
4.	The highest point or limit; the summit or ceiling: A roof on prices is needed to keep our customers happy. 
verb
, transitive
roofed, roofing, roofs
To furnish or cover with or as if with a roof. 
 
idiom.
go through the roof Slang
1.
	To grow, intensify, or rise to an enormous, often unexpected degree: Operating costs went through the roof last year. 
2.
	To become extremely angry: When I told her about breaking the window, she went through the roof. 
raise the roof
 Slang
1.
	To be extremely noisy and boisterous: The participants plan to dance, drink, and generally raise the roof at tonight's party. 
2.
	To complain loudly and bitterly: Angry tenants finally raised the roof about their noisy neighbors. 
 
 
[Middle English, from Old English hrōf.]