'Tantra' definitions:

Definition of 'tantra'

(from WordNet)
noun
Any of a fairly recent class of Hindu or Buddhist religious literature concerned with ritual acts of body and speech and mind
noun
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, Tantrism]

Definition of 'Tantra'

From: GCIDE
  • Tantra \Tan"tra\ (t[a^]n"tr[.a]; t[u^]n"tr[.a]), n. [Skr.] (Hinduism) A ceremonial treatise related to Puranic and magic literature; esp., one of the sacred works of the worshipers of Sakti. -- {Tan"tric} (t[a^]n"tr[i^]k), a. [Webster 1913 Suppl.]