The Collaborative International Dictionary of English v.0.48:

Shaman \Sha"man\, n. [From the native name.]
   A priest of Shamanism; a wizard among the Shamanists.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shaman
    n 1: in societies practicing shamanism: one acting as a medium
         between the visible and spirit worlds; practices sorcery
         for healing or divination [syn: shaman, priest-doctor]