1) A vessel used in brewing, the vat in which the wort is left to ferment.
1341 Duas parvas cunas [sic] quć vocantur gylefatts, York
1405 ‘putting 4 great hoops around le Gilefat’, Selby
1481 3 worteledes, 1 maskefat, 1 gilefat, 1 stepefat, Thornhill
1529 selle theyre newe ayle furth of the gylffat, York
1559 one maskefat, one gylefat, a leade, Pontefract
1611 one bruinge panne, two tubs & a gilefatt, Cottingley
1676 1 guilefat, 3s
2 runlits, 3s
1 maskfat, 2s 6d, Barley
1700 Naomi Robinson, alehouse-keeper, was upp with her Gile fatt till two a clock in the morning, Wakefield.