Source : Webster's Revised Unabridged Dictionary (1913)

Donatism \Don"a*tism\, n. [Cf. F. Donatisme.] (Eccl. Hist.)
   The tenets of the Donatists.

Source : WordNet®

Donatism
     n : a schismatic Christian religion in northern Africa from the
         4th to the 7th century; held that only those who led a
         blameless life belonged in the church or could administer
         the sacraments