Relating to the apostles or to the office of an apostle.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Of or relating to the twelve chosen followers of Christ, or to their age, doctrine, or practice; as, the apostolic faith.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Pertaining or according to the Apostles. Apostolic Fathers, Christian teachers in part contemporary with the Apostles. Apostolic See, the see of Rome or the Pope. Apostolic succession, the lineal transmission from the Apostles of the qualification necessary to constitute any one a minister of the grace of Christ.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)

Usage examples:

In other words you yield to accursed selfishness, utterly forgetful of the apostolic injunction: " In honor preferring one another."
- Quit Your Worrying! by George Wharton James
In a letter to the Cardinal, written soon after his arrival, Conn gave an account of along conversation he had had with Charles, in the course of which he remarked to his Majesty that the other powers of Christendom were extremely jealous of the relations which had begun to exist between the Apostolic See and Great Britain.
- Studies from Court and Cloister by J.M. Stone
He does not always bring his apostolic authority to mind at the beginning of his letters.
- The Expositor's Bible: Colossians and Philemon by Alexander Maclaren