noun a member of one of the religious orders called after st. augustine; an austin friar.
2. augustinian ·adj of or pertaining to st. augustine, bishop of hippo in northern africa (b. 354 - d. 430), or to his doctrines.
3. 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.