The Collaborative International Dictionary of English v.0.48:

Anglicanism \An"gli*can*ism\, n.
   1. Strong partiality to the principles and rites of the
      Church of England.
      [1913 Webster]

   2. The principles of the established church of England; also,
      in a restricted sense, the doctrines held by the
      high-church party.
      [1913 Webster]

   3. Attachment to England or English institutions.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Anglicanism
    n 1: the faith and doctrine and practice of the Anglican Church