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Definition of Mullion
1. Noun. A nonstructural vertical strip between the casements or panes of a window (or the panels of a screen).
Definition of Mullion
1. n. A slender bar or pier which forms the division between the lights of windows, screens, etc.
2. v. t. To furnish with mullions; to divide by mullions.
Definition of Mullion
1. Noun. A vertical bar between the panes of glass or casements of a window or the panels of a screen. ¹
¹ Source: wiktionary.com
Definition of Mullion
1. to provide with vertical dividing strips [v -ED, -ING, -S]
Medical Definition of Mullion
1. A slender bar or pier which forms the division between the lights of windows, screens, etc. An upright member of a framing. See Stile. Origin: A corruption of munnion, F. Moignon stump of an amputated limb, stump, OF. Moing mutilated; cf. Armor. Mon, moun, mank, monk, and also L. Mancus maimed. Source: Websters Dictionary (01 Mar 1998)