Meaning of mullion

mul•lion

Pronunciation: (mul'yun), [key]
— Archit. Archit.
—n.
  1. a vertical member, as of stone or wood, between the lights of a window, the panels in wainscoting, or the like.
  2. one of the radiating bars of a rose window or the like.
—v.t.
  1. to furnish with, or to form into divisions by the use of, mullions.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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