Quick definitions from WordNet (apostolical)
▸ adjective: of or relating to or deriving from the Apostles or their teachings
▸ adjective: proceeding from or ordered by or subject to a pope or the papacy regarded as the successor of the Apostles
▸ adjective: of or relating to or deriving from the Apostles or their teachings
▸ adjective: proceeding from or ordered by or subject to a pope or the papacy regarded as the successor of the Apostles