Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: mullion  múl-yun [N. Amer], mú-lee-un [Brit]
  1. A nonstructural vertical strip between the casements or panes of a window (or the panels of a screen)

Derived forms: mullions

Type of: slip, strip

Part of: window

Encyclopedia: Mullion, Cornwall