Source : Webster's Revised Unabridged Dictionary (1913)

Lama \La"ma\, n. [Thibet. blama (pronounced l["a]"ma) a chief, a
   high priest.]
   In Thibet, Mongolia, etc., a priest or monk of the belief
   called Lamaism.

   {The Grand Lama}, or {Dalai Lama} [lit., Ocean Lama], the
      supreme pontiff in the lamaistic hierarchy. See {Lamaism}.

Source : WordNet®

Dalai Lama
     n : chief lama and once ruler of Tibet [syn: {Grand Lama}]