1 a barricade, the central and taller part of a winter tent 20-.
2 a bow tent, sometimes a double bow tent 20. etymology: origin obscure; gailee form collected by EMcC/PS; Duncan Williamson suggests, ‘The gelly, so called for its shape – like a ship’s upturned galley, came into use – a straight tent, lower and longer with less room than the barricade’; sense 1 attested by JS, BW, DW, DW and BM in DB; sense 2 attested by BS in TDITA and SS note:
Canadian Paul Pope (2013) cites the form gailee ‘a bow tent’.