Entry 1 sense Webster, 1913 Augustine /äg'-əs-tēnˌ/ · Au·gus·tine · IPA /əˈɡʌstɪn/ 01 n. A member of one of the religious orders called after St. Augustine; an Austin friar. 1. A member of one of the religious orders called after St. Augustine; an Austin friar.(Eccl.)