New Testament Noun: ἀπόστολος (apostolos), GK 693 (S 652), 80×. apostolos broadly refers to a “messenger, delegate,” or “sent one.” In classical Greek, apostolos referred to a person of merit sent as an envoy or on behalf of a master in an administrative role. John uses the term in a similar way, applying it to any messenger without the specific idea of an office with special status (Jn 13:16). In contrast, in Luke apostolos is used almost solely as a designation for the Twelve (except