Antonym: floor. Similar words: go off, room, troop, bedroom, bathroom, courtroom, mushroom, classroom. Meaning: [ruːf] 
n. 1. a protective covering that covers or forms the top of a building 2. protective covering on top of a motor vehicle. v. provide a building with a roof; cover a building with a roof.
n. 1. a protective covering that covers or forms the top of a building 2. protective covering on top of a motor vehicle. v. provide a building with a roof; cover a building with a roof. 
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121) The boy frightened away the pigeons from the roof.
122) Last night's strong wind nearly took the roof off!
123) I've repaired the roof and it's quite sound now.
124) These pillars carry the weight of the roof.
125) The storm whipped the roof off last night.
126) We must mend the roof,the rain is getting in.
127) He climbed onto the roof for a dare.
128) Three pillars carries the whole roof.
129) I refuse to have such goings-on under my roof.
130) The roof of our house is no longer rainproof.
131) The roof collapsed under the weight of snow.
132) The roof came down on our heads.
133) They did a good repair job on the roof.
134) I'll have to see about getting the roof mended.
135) The roof was spanned by curved ribs of steel.
136) The roof was supported on oak struts.
137) A new roof will cost round about 1000.
138) The church roof was half hidden by trees.
139) The roof collapsed,(http://sentencedict.com/roof.html) showering us with dust and debris.
140) About fifteen inmates broke through onto the roof.
141) The fire had burned away part of the roof.
142) Four large columns upheld the building's heavy roof.
143) Glass fibre is often used as roof insulation.
144) Rain was splattering on the roof.
145) The roof had been shored up with old timbers.
146) A timber fell from the roof.
147) My word! Isn't that Jenkins on the roof?
148) He filled the barn to the roof with corn.
149) The rain will rust the iron roof.
150) He lofted his pigeons on the roof.