- roof [ro͞of, roof]n.pl. roofs [ME rof < OE hrof, akin to ON, roof, shed < IE base * k̑rapo- > OSlav stropŭ, roof]1. the outside top covering of a building2. figuratively, a house or home3. the top or peak of anything [the roof of the world]4. anything like a roof in position or use [the roof of the mouth]vt.to provide or cover with or as with a roof——————raise the roof Slang1. to be very noisy, as in applause, anger, celebration, etc.2. to complain loudlyrooflessadj.
English World dictionary. V. Neufeldt. 2014.