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Definition of mullion noun from the Oxford Advanced Learner's Dictionary

mullion

noun
 
/ˈmʌliən/
 
/ˈmʌliən/
(architecture)
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  1. a solid vertical piece of stone, wood or metal between two parts of a window
    Word Originmid 16th cent.: probably an altered form of monial.
See mullion in the Oxford Advanced American Dictionary
Check pronunciation: mullion

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brink
noun
 
 
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