a vertical member, as of stone or wood, between the lights of a window, the panels in wainscoting, or the like.
one of the radiating bars of a rose window or the like.
to furnish with, or to form into divisions by the use of, mullions.
- un·mul·lioned, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use mullion in a sentence
Then, in the dining-room, those same eyes rested on the coffered ceiling and the portraits and the wide mullioned lattice.Mushroom Town | Oliver Onions
The north and south aisles had formerly mullioned windows, which are now walled up.Milton's England | Lucia Ames Mead
On the landing of the staircase stood a boy of eleven or twelve years of age, looking sadly out of the mullioned window.The Court Jester | Cornelia Baker
A well of moonlight was revealed—a broad, padded seat in front of a tall mullioned window.What Will People Say? | Rupert Hughes
It had a minstrels' gallery, a big hall and a little hall, mullioned windows and all the rest of it.The Gay Cockade | Temple Bailey
British Dictionary definitions for mullion
a vertical member between the casements or panes of a window or the panels of a screen
one of the ribs on a rock face
(tr) to furnish (a window, screen, etc) with mullions
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