n. A trench made by digging; particularly, a trench for draining wet land, or for making a barrier to guard inclosures, or for preventing an enemy from approaching a town or a fortress.n. Any narrow open passage for water on the surface of the ground.To dig or make a ditch or ditches: as, ditching and delving; hedging and ditching.To dig a ditch or ditches in; drain by a ditch: as, to ditch moist land.To surround with a ditch.To throw or run into or as if into a ditch: as, to ditch a railway-train.