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[dawr-mer] /ˈdɔr mər/
Also called dormer window. a vertical window in a projection built out from a sloping roof.
the entire projecting structure.
Origin of dormer
1585-95; < Middle French dormoir dormitory
Related forms
dormered, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for dormer
  • Porches wrap about the first two floors, and dormer windows punctuate the mansard roof.
  • We often think of window seats as existing only in built-in, recessed window casings or dormer-style nooks.
  • But from its three dormer windows, the views are among the best in the inn.
  • Application is to construct an addition and dormer and modify masonry openings.
  • Examples can include a large section of roofing, or a dormer or chimney.
  • She said the diagonal dormer changes the roofline, does not meet the guidelines and will set a precedent.
  • The dormer windows, decorative cornice and filigree iron cresting are other notable elements in the architecture.
  • The roof is often punctures by dormers and dormer windows of various shapes.
  • The roof has changed over the years, but still visible inside is the original framing for the dormer and doorway.
  • Although two dormers is typical, there may be a single dormer or as many as four.
British Dictionary definitions for dormer


a construction with a gable roof and a window at its outer end that projects from a sloping roof Also called dormer window
Word Origin
C16: from Old French dormoir, from Latin dormītōriumdormitory
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for dormer

1590s, originally "window of a sleeping room," from Middle French dormeor "sleeping room," from dormir "to sleep" (see dormant).

Online Etymology Dictionary, © 2010 Douglas Harper
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