The Collaborative International Dictionary of English v.0.48:

Catholic \Cath"o*lic\, n.
   1. A person who accepts the creeds which are received in
      common by all parts of the orthodox Christian church.
      [1913 Webster]

   2. An adherent of the Roman Catholic church; a Roman
      Catholic.
      [1913 Webster]

   Old Catholic, the name assumed in 1870 by members of the
      Roman Catholic church, who denied the ecumenical character
      of the Vatican Council, and rejected its decrees, esp.
      that concerning the infallibility of the pope, as contrary
      to the ancient Catholic faith.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Old Catholic
    n 1: a member of the church formed in the 19th century by German
         Catholics who refused to accept the infallibility of the
         Pope