Definition of "roof" []

  • The exterior surface and its supporting structures on the top of a building. (noun)
  • The upper exterior surface of a dwelling as a symbol of the home itself: three generations living under one roof. (noun)
  • The top covering of something: the roof of a car. (noun)
  • The upper surface of an anatomical structure, especially one having a vaulted inner structure: the roof of the mouth. (noun)
  • The highest point or limit; the summit or ceiling: A roof on prices is needed to keep our customers happy. (noun)
  • A structure that covers or forms the top of a building (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

  • (in combination) (noun)
  • (as modifier) (noun)
  • The top covering of a vehicle, oven, or other structure (noun)
  • Any structure that covers an organ or part (noun)
  • A highest or topmost point or part (noun)
  • A house or other shelter (noun)
  • The underside of a projecting overhang (noun)
  • To provide or cover with a roof or rooflike part (verb) (c) HarperCollins Publishers Ltd 2016

Use "roof" in a sentence
  • ""What comes from the roof," may not be very intelligible; still _roof_ is the word in the original edition of Gibbon, where it corresponds to _toit_ in"
  • "The main body of the house is 14 feet high to the plates; the lower rooms are 9 feet high; the roof has a pitch of 35° from a horizontal line, giving partially-upright chambers in the main building, and _roof_ lodging rooms in the rear."
  • "Has it ever occurred to you to ask the question, what effect the cottage would have upon your feelings if it had _no roof_? no visible roof, I mean; -- if instead of the thatched slope, in which the little upper windows are buried deep, as in a nest of straw -- or the rough shelter of its mountain shales -- or warm coloring of russet tiles -- there were nothing but a flat leaden top to it, making it look like a large packing-case with windows in it?"