- pertaining to St. Augustine of Hippo, to his doctrines, or to any religious order following his rule.
- a member of any of several religious orders deriving their name and rule from St. Augustine.
- a person who adopts the views or doctrines of St. Augustine.
- of or relating to Saint Augustine of Hippo, his doctrines, or any of the Christian religious orders that were founded on his doctrines
- a member of any of several religious orders, such as the Augustinian Canons, Augustinian Hermits, and Austin Friars which are governed by the rule of Saint Augustine
- a person who follows the doctrines of Saint Augustine
