Source : Webster's Revised Unabridged Dictionary (1913)

Hindooism \Hin"doo*ism\, Hinduism \Hin"du*ism\, n.
   The religious doctrines and rites of the Hindoos; Brahmanism.

Source : WordNet®

Hindooism
     n 1: the predominant religion of India; characterized by a caste
          system and belief in reincarnation [syn: {Hinduism}]
     2: a body of religious and philosophical beliefs and cultural
        practices native to India and characterized by a belief in
        reincarnation and a supreme beingof many forms and
        natures, by the view that opposing theories are aspects of
        one eternal truth, and by a desire for liberation from
        earthly evils [syn: {Hinduism}]