intrenchment

INTRENCH'MENT, n. Properly, a trench or ditch only; but as the earth thrown out of a trench forms a part,and often the most necessary and useful part of a fortification, hence intrenchment is generally understood to signify a ditch and parapet,and sometimes it signifies fascines covered with earth, gabions, bags filled with earth, or other materials collected to cover men from an enemy's fire.