Definitions Found:
to provide the upright division between the panes of a window
- mullionto provide the upright division between the panes of a window
- mullionedMULLION, to provide the upright division between the panes of a window
- mullioningMULLION, to provide the upright division between the panes of a window
- moniala mullion, the upright division between the panes of a window
- monialsMONIAL, a mullion, the upright division between the panes of a window