to cut in; to furrow; to make trenches in or upon.-to surround with a trench or with intrenchments, as in fortification; to fortify with a ditch and parapet; as, the army intrenched their camp, or intrenched itself.-to invade; to encroach; to infringe or trespass; to enter on, and take possession of, that which belongs to another; -- usually followed by on or upon; as, the king was charged with intrenching on the rights of the nobles, and the nobles were accused of intrenching on the prerogative of the crown.