Source : Webster's Revised Unabridged Dictionary (1913)

Tantrism \Tan"trism\, n.
   The system of doctrines and rites taught in the tantras. --
   {Tan"trist}, n.

Source : WordNet®

Tantrism
     n 1: movement within Buddhism combining elements of Hinduism and
          paganism
     2: doctrine of enlightenment as the realization of the oneness
        of one's self and the visible world; combines elements of
        Hinduism and paganism including magical and mystical
        elements like mantras and mudras and erotic rites;
        especially influential in Tibet [syn: {Tantra}]