• synonyms


[muhl-yuh n]Architecture
See more synonyms for mullion on Thesaurus.com
  1. a vertical member, as of stone or wood, between the lights of a window, the panels in wainscoting, or the like.
  2. one of the radiating bars of a rose window or the like.
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verb (used with object)
  1. to furnish with, or to form into divisions by the use of, mullions.
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Origin of mullion

First recorded in 1560–70; metathetic variant of monial
Related formsun·mul·lioned, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for mullioned

diagonally, horizontally, vertically, crossways, bay, aperture, bow, fenestella, oriel, jalousie, dormer, casement, fenestration, fanlight, fenestra, lunette, skylight, porthole, lancet, angular

Examples from the Web for mullioned

Historical Examples of mullioned

  • Over these also are mullioned windows with blank interstices.

    The New Guide to Peterborough Cathedral

    George S. Phillips

  • But these also were mullioned, and the entire frontage of the house was uniform in its style.

  • The mullioned windows were so constructed that no one could enter through them.

  • Beside this archway was a mullioned window with latticed panes.

    Glories of Spain

    Charles W. Wood

  • Here was the open landscape in front of the mullioned windows.

    Hard Pressed

    Fred M. White

British Dictionary definitions for mullioned


  1. a vertical member between the casements or panes of a window or the panels of a screen
  2. one of the ribs on a rock face
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  1. (tr) to furnish (a window, screen, etc) with mullions
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Word Origin for mullion

C16: variant of Middle English munial, from Old French moinel, of unknown origin
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

Word Origin and History for mullioned



"vertical column between the lights of a window," 1560s, metathesis of Middle English moyniel (early 14c.), from Anglo-French moinel, noun use of moienel (adj.) "middle," from Old French meien "intermediate, mean" (see mean (adj.)). Related: Mullioned.

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Online Etymology Dictionary, © 2010 Douglas Harper