LIEUTENANT (locum tenens, holding the place of), in a military sense, means the person second in command: as, lord-lieutenant, one who represents the prince or governing power; lieutenant-general, one who stands next to the general; lieutenant-colonel, the next to a colonel; and lieutenant, the next to a captain, in every company of both foot and horse, and who takes the command upon the death or absence of a superior officer. See ARMY, COMMISSION, &c.