The Collaborative International Dictionary of English v.0.48:

Brahmanism \Brah"man*ism\, Brahminism \Brah"min*ism\, n.
   The religion or system of doctrines of the Brahmans; the
   religion of Brahma.
   [1913 Webster] Brahmanist

WordNet (r) 3.0 (2006):

Brahmanism
    n 1: the religious and social system of orthodox Hinduism [syn:
         Brahmanism, Brahminism]
    2: the religious beliefs of ancient India as prescribed in the
       sacred Vedas and Brahmanas and Upanishads [syn: Brahmanism,
       Brahminism]