mullion mulligrubs • mullioned · · · Info · Definitions · Characters · · mullion · · Text Latin · · Script 7 · · Length 2 · · Syllables Definitions · · · (noun) a nonstructural vertical strip between the casements or panes of a window (or the panels of a screen). · · Noun Definition 1 Characters · · i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F u latin small letter u U+0075