NOUN (2)

1. sect founded in the 6th century BC as a revolt against Hinduism;

2. religion founded in the 6th century BC as a revolt against Hinduism; emphasizes asceticism and immortality and transmigration of the soul; denies existence of a perfect or supreme being;

The Collaborative International Dictionary of English v.0.48:

Jainism \Jain"ism\, n.
   The heterodox Hindu religion, founded in the 6th century as a
   revolt against Hinduism; its most striking features are the
   exaltation of saints or holy mortals, called jins, above the
   ordinary Hindu gods, and the denial of a supreme being and of
   the divine origin and infallibility of the Vedas. Also, the
   sect comprising those adhering to Jainism. Jainism believes
   in immortality and the transmigration of the soul. It is
   intermediate between Brahmanism and Buddhism, having some
   things in common with each.
   [1913 Webster + WordNet 1.5]

WordNet (r) 3.0 (2006):

Jainism
    n 1: sect founded in the 6th century BC as a revolt against
         Hinduism
    2: religion founded in the 6th century BC as a revolt against
       Hinduism; emphasizes asceticism and immortality and
       transmigration of the soul; denies existence of a perfect or
       supreme being