Ditch1, n.
n. [A.-S. dic, ditch, dike. See DIKE and DIG.]
Sense 1. A trench in the earth made by digging, particularly a trench for draining wet land, for guarding or fencing inclosures, or for preventing an approach to a town or fortress. In the latter sense, it is called also a fosse or moat, and is dug round the rampart or wall between the scarp and counterscarp. It may be either wet or dry.
Sense 2. Any long, narrow receptacle of water on the surface of the earth.