1. To divide by mullions.

2. An upright division in a window-frame.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• mellions,
• millikon,
• milliont,
• miullion,
• milluion,
• millionm,
• milion,
• millon,
• millio,
• miillion,
• milliom,
• miltion,
• mllion,
• boullion,
• milllion,
• illion,
• milliin,
• bullin,
• miilion,
• nillion

• mullan,
• Mullen,
• million,
• mullaney,
• mullein,
• mullane,
• mullin.

The adjective form of "mullion" is "mullioned".

The plural of the "mullion" can be the "mullions".

The singular of the "mullion" can be the "mullion".