·noun A member of one of the religious orders called after St. Augustine; an Austin friar.
II. Augustinian ·adj Of or pertaining to St. Augustine, bishop of Hippo in Northern Africa (b. 354 - d. 430), or to his doctrines.
III. Augustinian ·noun One of a class of divines, who, following St. Augustine, maintain that grace by its nature is effectual absolutely and creatively, not relatively and conditionally.