What does "augustinian" mean?

Additional senses

1. 2.Of or pertaining to St. Augustine, bishop of Hippo in Northern Africa (b. 354 -- d. 430), or to his doctrines. Augustinian canons, an order of monks once popular in England and Ireland; -- called also regular canons of St. Austin, and black canons. -- Augustinian hermits or Austin friars, an order of friars established in 1265 by Pope Alexander IV. It was introduced into the United States from Ireland in 1790. -- Augustinian nuns, an order of nuns following the rule of St. Augustine. -- Augustinian rule, a rule for religious communities based upon the 109th letter of St. Augustine, and adopted by the Augustinian orders.
2. 3.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.