n. An ecclesiastic attached to a chapel; especially, one officiating in the private chapel of a king or nobleman, or other person of wealth or distinction.n. An ecclesiastic who renders service to one authorized to employ such assistance, as to an archbishop, or to a family; a confessor.n. A clergyman who occupies an official position, and performs certain religious functions, in the army or navy, in a legislative or other public body, in a charitable institution, or the like: as, the chaplain of the House of Representatives.n. A private secretary to the lady superior of a convent.