To cut, as a notch, hole, mark, etc.; form by cutting; carve; incise.To cut into; form a ditch, trench, or other linear depression in: as, to trench the ground round a camp or a fort.In agriculture, to furrow deeply, especially with the spade; dig deeply and turn over thoroughly by means of a succession of contiguous trenches.In cabinet-making and the like, to work with a long continuous groove, as a rail which is to be fitted upon the heads of a series of bars or balusters.To cut; slash.Specifically, to form a trench or trenches; proceed by or as if by means of trenches.To encroach; infringe; obtrude as if by cutting into something: used of conduct, expression, or the like, usually with on or upon: as, to trench upon another's rights. Also intrench.To reach out; extend; tend.Synonyms Encroach upon, Infringe, etc. See trespass.n. A narrow excavation of considerable length cut into the earth; a deep furrow or ditch.n. A lane or road cut through shrubbery or woods.