(of a window) with mullions

(architecture) A vertical bar between the panes of glass or casements of a window or the panels of a screen.

(transitive) To shape into divisions by means of mullions.

plural of mullion

plural of mullioning

present participle of mullion

An arrangement of mullions.

A village and civil parish in south-west Cornwall, England (OS grid ref SW6719). / A locality in Yass Valley Shire, Southern Tablelands, New South Wales, Australia.