| Fosse 1. (n.) A ditch or moat. 2. (n.) See Fossa. Thesaurus Entries abri, approach trench, aqueduct, bunker, canal, canalization, channel, communication trench, countermine, coupure, crimp, cut, dike, ditch, double sap, dugout, entrenchment, fire trench, flying sap, fortified tunnel, foxhole, gallery, goffer, gutter, ha-ha, kennel, mine, moat, parallel, pleat, sap, slit trench, sunk fence, trench, trough, tunnel | ![]() |