Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- n. A vertical member, as of stone or wood, dividing a window or other opening.
Century Dictionary and Cyclopedia
- n. In architecture: A division, typically of stone, between the lights of windows, screens, etc. Mullions were first used toward the close of the twelfth century, and reached their most perfect development about the middle of the thirteenth century. In the later medieval architecture, while becoming constantly more elaborate in design and in moldings, and exhibiting much science in the methods of assembling, the mullions are artistically less satisfactory in their lines. The word is in the plural almost synonymous with tracery. See also cuts under batement-light, geometric, decorated, flamboyant.
- n. One of the divisions between panels in wainscoting. Formerly monial.
- To form into divisions by the use of mullions.
Wiktionary
GNU Webster's 1913
- n. A slender bar or pier which forms the division between the lights of windows, screens, etc.
- n. An upright member of a framing. See stile.
- v. To furnish with mullions; to divide by mullions.
WordNet 3.0
- n. a nonstructural vertical strip between the casements or panes of a window (or the panels of a screen)
Etymologies
- Alteration of Middle English moniel, from Anglo-Norman moynel, perhaps from moienel, middle, from moien, from Latin mediānus, from medius. (American Heritage® Dictionary of the English Language, Fourth Edition)
Examples
“Brick-clad columns and spandrel beams frame large, recessed storefront windows whose glazing is subdivided with elaborate mullion patterns.”
“There are large "alfices" (rectangular ornamentation in the façade) enhancing the entrance, windows with small open spaces, separated by a small column-like mullion and multiple arches similar to the architecture found in Granada, Spain.”
“A recent visit to the house revealed that these corners must have finally failed or become too energy inefficient, as there was an additional mullion (black, I think) in place of each mitred corner.”
“Each one is surrounded by hedges and a bluestone terrace with seating, and according to Cetra/Ruddy founding principal Nancy Ruddy, the "mullion-free glass" floor-to-ceiling windows create "an indoor/outdoor experience for residents using the space.”
“Costume design: window mullion insertion and detailing”
“But, a multi-mullion dollar bridge to serve 400 people in Alaska that wipes out the natural habitat of thousands of animals will NEVER be a good thing in my mind.”
“The vertical line of the hay fork's middle prong rises almost dead center and is echoed in window's mullion, the house's lightning rod, its porch posts and siding and even in the seams of Papa's overalls.”
“A sitting room has a hand-painted ceiling frieze and a stone mullion fireplace.”
“In the mullion-windowed smoking-room, where men retired, and women too sometimes, into chairs old, soft, leathery, the ball of talk was lightly tossed, and naught so devastating as Foggartism mentioned.”
“He lay in a room with mullion windows, an ascetic room in a sixteenth-century house, close to the Cathedral, whose scent of age was tempered but imperfectly by the September air coming in.”
Lists
These user-created lists contain the word ‘mullion’.
-
phrontistery - m
from phrontistery.info
multiloculate, multilocation, multiflorous, multifid, multifarious, multicipital, multeity, multarticulate, multanimous, mulse, mullock, mullion and 898 more...
-
wallace
Remington, Windsor, prorector, wen, aver, mottle, seltzer, tepee, lapidary, effete, sotto, presbyopia and 351 more...
-
buzzwords
oddities of any kind
recuse, sipe, mullion, cairngorm, gormless, thole, drug, rutch, plonk, yips, gurry, reredos and 8 more...
-
Lions and tigers and—Well, just lions...
million, billion, trillion, quadrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion, undecillion, duodecillion and 66 more...
-
Cold comfort farm again
cowdling, snoot, snood, scullion, dormer, mullion, kith, scranlet, teazel, whickering, loafing, dissever and 27 more...
-
Mulling
Martin Mull, mulled wine, mulled cider, mull, mulls, mulling, muller, mull over, India mull, French mull, mullmull, mullen and 18 more...
-
ktrey's wordlist
Words that I like.
Many may be lexicographically impotent due to a lack of citations and definition. Hopefully I'll be able to rectify this eventually.velleity, dispositive, bloviate, bibulous, fungible, concupiscence, avuncular, carnaptious, thrawn, hypocoristic, diegesis, lagniappe and 928 more...
-
Cold Comfort Farm
From the novel by Stella Gibbons
tyro, bustle, locust years, lambency, mere, berg, fen, bilious, cataclysm, flapdoodle, vulgar, serener and 98 more...
-
Infinite Jest
Words taken from Infinite Jest by David Foster Wallace.
prorector, monograph, post-fourier, snuffle, rototremble, creatus, enfilade, subanimalistic, balletic, espadrilles, leonine, cirri and 1153 more...
-
Castles and Keeps
Shamelessly ripped off from this site and others (to be named hereinafter). (Fair warning: for my own edification, I may add definitions/comments from the site, but you might want to just go there ...
abutment, adulterine, allure, angle-spur, apse, arbalest, arbalestier, arbalist, arcade, arch, armoury, arrow slit and 410 more...
-
Professional Scrabble Lexicon (TWL)
A myriad of game-changing words every Scrabble addict must have in his arsenal.
Keep in mind that these are all tried-and-true feasibly playable words selected for their handiness, i.e...paragon, pignora, ganef, suttee, origan, ohia, aioli, abasement, lehr, mho, tallow, harelike and 842 more...
-
Resource
katabatic, clerestory, haslet, alpenglow, purl, scumble, jessant, spavined, wayworn, creach, dottle, solferino and 165 more...
-
Tolland's list
Those I've come across and try to keep fresh within my mind.
clandestine, dysphoric, indictive, vigil, fractious, assiduous, indefatigable, ubiquitous, insidious, paroicous, aplomb, sangfroid and 654 more...
-
learning
A list of words whose meanings I am learning, either because a) I don't know the meaning b) I know the meaning, but could stand to better appreciate certain inflections or secondary meanings or c) ...
louche, educe, loam, cob, sclerotic, palliate, axial, syndicalist, ecumenical, sally, fatuous, parvenu and 1381 more...
-
You May Tell Yourself, "This Is Not M...
.
cornice, balustrade, dado, bargeboard, buttress, clerestory, crenellation, cupola, corbel, dentil, vergeboard, quatrefoil and 101 more...
-
rememberers
prolix, ageusia, animadversion, anodyne, antic, arabesque, beadle, brachymetropia, colophon, desquamation, diaphoresis, diegesis and 3248 more...
Tweets
Looking for tweets for mullion.

Louises "This sluggish animal light that was baring the dormers and mullions and scullionsof Cold Comfort Farm" Feb 17, 2013
ruzuzu "1. In architecture: A division, typically of stone, between the lights of windows, screens, etc. Mullions were first used toward the close of the twelfth century, and reached their most perfect development about the middle of the thirteenth century. In the later medieval architecture, while becoming constantly more elaborate in design and in moldings, and exhibiting much science in the methods of assembling, the mullions are artistically less satisfactory in their lines. The word is in the plural almost synonymous with tracery. See also cuts under batement-light, geometric, decorated, flamboyant.
2. One of the divisions between panels in wainscoting. Formerly monial.
3. To form into divisions by the use of mullions."
--Century Dictionary Sep 16, 2010