What does mullion mean?
A vertical dividing bar in a window, door, or wall, typically made of stone, wood, or metal. A mullion is a structural element that divides a window or door into smaller sections.
Example
"The Gothic cathedral's stained glass windows featured intricate stone mullions that refracted the light beautifully."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.