Roof Definition

ro͝of, ro͝of
roofed, roofing, roofs
noun
roofs
The outside top covering of a building.
Webster's New World
Figuratively, a house or home.
Webster's New World
The upper exterior surface of a dwelling as a symbol of the home itself.
Three generations living under one roof.
American Heritage
The top or peak of anything.
The roof of the world.
Webster's New World
The upper surface of an anatomical structure, especially one having a vaulted inner structure.
The roof of the mouth.
American Heritage Medicine
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verb
roofed, roofing
To provide or cover with or as with a roof.
Webster's New World
pronoun

(astronomy) A Chinese constellation located near Aquarius and Pegasus, one of the 28 lunar mansions and part of the larger Black Turtle.

Wiktionary
idiom
go through the roof
  • To grow, intensify, or rise to an enormous, often unexpected degree:

    Operating costs went through the roof last year.

  • To become extremely angry:

    When I told her about breaking the window, she went through the roof.

American Heritage
raise the roof
  • To be extremely noisy and boisterous:

    They raised the roof at the party.

  • To complain loudly and bitterly:

    Angry tenants finally raised the roof about their noisy neighbors.

American Heritage
hit the roof
  • to become suddenly or violently angry
Webster's New World
raise the roof
  • to be very noisy, as in applause, anger, celebration, etc.
  • to complain loudly
Webster's New World
through the roof
  • at or to an extremely high point or level

    a TV show with ratings through the roof

Webster's New World
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Other Word Forms of Roof

Noun

Singular:
roof
Plural:
roofs, rooves

Idioms, Phrasal Verbs Related to Roof

Origin of Roof

  • From Middle English rof, from Old English hrōf (“roof, ceiling; top, summit; heaven, sky"), from Proto-Germanic *hrōfÄ… (“roof"), from Proto-Indo-European *krāpo- (“roof"), from Proto-Indo-European *krāwǝ- (“to cover, heap"). Cognate with Scots ruif (“roof"), Dutch roef (“a cabin, wooden cover, deckhouse"), Low German rof (“roof"), Icelandic hróf (“a shed under which ships are built or kept, roof of a boathouse").

    From Wiktionary

  • Middle English from Old English hrōf

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Mandarin Chinese 危宿 (WÄ“ixiù)

    From Wiktionary

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