A ditch is a small-to-moderate size trench created to channel water. How to use ditch in a sentence. If you ditch something that you have or are responsible for, you abandon it or get rid of it, because you no longer want it. A long narrow trench or furrow dug in the ground, as for irrigation, drainage, or a boundary line. To dig or make a long narrow trench or furrow in. To surround with a long narrow trench or furrow. a long, narrow open hole that is dug into the ground, usually at the side of a road or field…. 6 days ago · ditch (third-person singular simple present ditches, present participle ditching, simple past and past participle ditched) (transitive) To discard or abandon. Once the sun came out we ditched … DITCH definition: a long, narrow excavation made in the ground by digging, as for draining or irrigating land; trench. See examples of ditch used in a sentence. A ditch is a long trench or pit dug into the ground. If your lawns are always soggy, build a drainage ditch for the excess water to flow into.