Trench, v. i.
1. To encroach; to intrench.
Does it not seem as if for a creature to challenge to itself a boundless attribute, were to trench upon the prerogative of the divine nature? --I. Taylor.
2. To have direction; to aim or tend. [R.]
To trench at, to make trenches against; to approach by trenches, as a town in besieging it. [Obs.]
Like powerful armies, trenching at a town
By slow and silent, but resistless, sap. --Young.