Source : Webster's Revised Unabridged Dictionary (1913)

Lamaism \La"ma*ism\, n.
   A modified form of Buddhism which prevails in Thibet,
   Mongolia, and some adjacent parts of Asia; -- so called from
   the name of its priests. See 2d {Lama}.

Source : WordNet®

Lamaism
     n : a Buddhist doctrine that includes elements from India that
         are not Buddhist and elements of preexisting shamanism
         [syn: {Tibetan Buddhism}]