Mullion (proper noun) /ˈmʌliən/
1
(OS grid ref SW6719) A village and civil parish in south-west Cornwall, England .
2
A locality in Yass Valley council area, Southern Tablelands, New South Wales, Australia.
mullion (noun) /ˈmʌliən/
1
(architecture) A vertical bar between the panes of glass or casements of a window or the panels of a screen.
mullion (verb) /ˈmʌliən/
1
(transitive) To shape into divisions by means of mullions.