mullion

American  

[muhl-yuhn] / ˈmʌl yən /

noun

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.

mullion British  

/ ˈmʌlɪən /

noun

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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verb

1. (tr) to furnish (a window, screen, etc) with mullions

Other Word Forms

• unmullioned adjective

Etymology

Origin of mullion

First recorded in 1560–70; metathetic variant of monial

Example Sentences

It has garnered almost 1.5 mullion views to date.

From New York Times • Sep. 2, 2020

Biden campaign manager Jen O’Malley Dillon kicked off the fundraiser, saying the campaign had received donations from 175,000 supporters and raked in $7.6 mullion, marking its largest single fundraising event of the election cycle.

From Washington Times • Jun. 23, 2020

Actually, it's the central mullion of a window and its shadow, widened and dislocated by perception and imagination.

From Time • Apr. 2, 2010

But even if Chartres had been pulverized to dust, it could probably be rebuilt exactly, down to the remotest crocket and mullion.

From Time Magazine Archive

There’s too much ornate woodwork here, and the precious layerings of molding and mullion and balustrade and apse, all those thousands of genteel decisions, the studied cuts, just unsettle me.

From "Native Speaker" by Chang-rae Lee