mullion: Meaning and Definition of
Pronunciation: (mul'yun), [key]
— Archit. Archit.
- a vertical member, as of stone or wood, between the lights of a window, the panels in wainscoting, or the like.
- one of the radiating bars of a rose window or the like.
- to furnish with, or to form into divisions by the use of, mullions.
- mullion (Thesaurus)