\Au`gus*tin"i*an\, a.
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.

\Au`gus*tin"i*an\, n.
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.