Source : Webster's Revised Unabridged Dictionary (1913)

Pietism \Pi"e*tism\ (p[imac]"[-e]*t[i^]z'm), n. [Cf. G.
   pietismus, F. pi['e]tisme.]
   1. The principle or practice of the Pietists.

   2. Strict devotion; also, affectation of devotion.

            The Sch["o]ne Seele, that ideal of gentle pietism,
            in ``Wilhelm Meister.''               --W. Pater.

Source : WordNet®

Pietism
     n 1: 17th and 18th-century German movement in the Lutheran Church
          stressing personal piety and devotion
     2: exaggerated or affected piety and religious zeal [syn: {religiosity},
         {religiousism}]