Au·gus·tin·i·an 
(ô′gə-stĭnē-ən)
(ô′gə-stĭnē-ən)adj.
1. Of or relating to Saint Augustine of Hippo or his doctrines.
2. Being or belonging to any of several religious orders following or influenced by the rule of Saint Augustine.
n.
1. A follower of the principles and doctrines of Saint Augustine.
2. A monk or friar belonging to any of the Augustinian orders.
Au′gus·tini·an·ism, Au·gustin·ism (ô-gŭstĭ-nĭz′əm) n.