Mullion definition
A vertical member, as of stone or wood, dividing a window or other opening.
noun
A slender, vertical dividing bar between the lights of windows, doors, etc.
noun
To furnish with or divide by mullions.
verb
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Alternative Forms
Alternative Form of mullion -
munnion
Other Word Forms
Noun
Singular:
mullion
Plural:
mullionsOrigin of mullion
- Alteration of Middle English moniel from Anglo-Norman moynel perhaps from moienel middle from moien from Latin mediānus from medius medhyo- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
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From Wiktionary