(n) (Roman Catholic Church) Greek patriarch of Alexandria who championed Christian orthodoxy against Arianism; a church father, saint, and Doctor of the Church (293-373), Syn. Athanasius the Great, St. Athanasius, Saint Athanasius
a. Of or pertaining to Athanasius, bishop of Alexandria in the 4th century. [ 1913 Webster ]
Athanasian creed, a formulary, confession, or exposition of faith, formerly supposed to have been drawn up by Athanasius; but this opinion is now rejected, and the composition is ascribed by some to Hilary, bishop of Arles (5th century). It is a summary of what was called the orthodox faith. [ 1913 Webster ]