Rare, chiefly technical or historical: ‘to furnish with a gallery or galleries’.
Definitions
To furnish or supply (a building, room, mine, etc.) with a gallery or galleries. The architects planned to gallery the nave to increase seating capacity.
To dig or bore passages or tunnels through (earth, wood, etc.), as insects or miners do. The beetles had galleried the old timber, leaving it riddled with tiny tunnels.