The Collaborative International Dictionary of English v.0.48:

Creed \Creed\ (kr[=e]d), n. [OE. credo, crede, AS. creda, fr. L.
   credo I believe, at the beginning of the Apostles' creed, fr.
   credere to believe; akin to OIr. cretim I believe, and Skr.
   [,c]raddadh[=a]mi; [,c]rat trust + dh[=a] to put. See Do,
   v. t., and cf. Credo, Grant.]
   1. A definite summary of what is believed; esp., a summary of
      the articles of Christian faith; a confession of faith for
      public use; esp., one which is brief and comprehensive.
      [1913 Webster]

            In the Protestant system the creed is not coordinate
            with, but always subordinate to, the Bible.
                                                  --Schaff-Herzog
                                                  Encyc.
      [1913 Webster]

   2. Any summary of principles or opinions professed or adhered
      to.
      [1913 Webster]

            I love him not, nor fear him; there's my creed.
                                                  --Shak.
      [1913 Webster]

   Apostles' creed, Athanasian creed, Nicene creed. See
      under Apostle, Athanasian, Nicene.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Athanasian \Ath`a*na"sian\ (?; 277), 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]

WordNet (r) 3.0 (2006):

Athanasian Creed
    n 1: a Christian profession of faith