n. administrator is a person lawfully appointed, with his assent, by an officer having jurisdiction. The terms is used in the context of trusts. Herein an administrator is the person who is needed to manage and settle the estate of a deceased person who has left no executor, or one who is for. the time incompetent or unable to act. Usually the administrator is vested with full and ample power to take possession of all the personal estate, to sell it, to collect the debts due, to pay the debts, authorized to bring and defend actions, etc.