Source : Webster's Revised Unabridged Dictionary (1913)

Latitudinarian \Lat`i*tu`di*na"ri*an\, a. [Cf. F.
   latitudinaire.]
   1. Not restrained; not confined by precise limits.

   2. Indifferent to a strict application of any standard of
      belief or opinion; hence, deviating more or less widely
      from such standard; lax in doctrine; as, latitudinarian
      divines; latitudinarian theology.

            Latitudinarian sentiments upon religious subjects.
                                                  --Allibone.

   3. Lax in moral or religious principles.

Latitudinarian \Lat`i*tu`di*na"ri*an\, n.
   1. One who is moderate in his notions, or not restrained by
      precise settled limits in opinion; one who indulges
      freedom in thinking.

   2. (Eng. Eccl. Hist.) A member of the Church of England, in
      the time of Charles II., who adopted more liberal notions
      in respect to the authority, government, and doctrines of
      the church than generally prevailed.

            They were called ``men of latitude;'' and upon this,
            men of narrow thoughts fastened upon them the name
            of latitudinarians.                   --Bp. Burnet.

   3. (Theol.) One who departs in opinion from the strict
      principles of orthodoxy.

Source : WordNet®

latitudinarian
     adj : unwilling to accept authority or dogma (especially in
           religion) [syn: {free-thinking}, {undogmatic}, {undogmatical}]
     n : a person who is broad-minded and tolerant (especially in
         standards of religious belief and conduct)