Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Learn more. A…. ‘Unusually thin mullions span the tall space, turning it into a gigantic glass jigsaw puzzle recomposing the view.’ ‘The configuration and mullion patterns of several … 1. a nonstructural vertical strip between the casements or panes of a window (or the panels of a screen) Familiarity information: MULLION used as a noun is very rare. Side Effects & Safety Mullein is POSSIBLY SAFE when applied directly to the ear, short-term. • MULLION (noun) The noun MULLION has 1 sense:. Definition and synonyms of mullion from the online English dictionary from Macmillan Education. This video shows you how to say Mullioned.ELIMINATE STUDENT LOANS AND OTHER DEBT USING SOCIAL MEDIA! ‘Unusually thin mullions span the tall space, turning it into a gigantic glass jigsaw puzzle recomposing the view.’ ‘The configuration and mullion patterns of several … This is the British English definition of mullion.View American English definition of mullion. Learn more. mull pronunciation. It's an ethnic slur for a black person, seemingly common for Italian-Americans. 2. As User says, it comes from the Southern Italian mulignana, meaning eggplant, though most sources listed it as Sicilian. Mullion definition: a vertical member between the casements or panes of a window or the panels of a screen | Meaning, pronunciation, translations and examples How to say mull. Listen to the audio pronunciation in English. Grilles: Alternative to Muntin and Mullion Terminology Few window companies today make a distinction between muntins, mullions, and stiles because few window buyers care about this. View the pronunciation for mullion. mullioned definition: 1. Definition of mullion noun in Oxford Advanced Learner's Dictionary. Change your default dictionary to American English. Mullions are the single vertical supports used in two-pane assemblies. Dictionary entry overview: What does mullion mean? A mullioned window has vertical parts, usually made of stone, separating the glass parts.