WordNet (r) 3.0 (2006):

mind reader
    n 1: someone with the power of communicating thoughts directly
         [syn: telepathist, thought-reader, mental
         telepathist, mind reader]
    2: a magician who seems to discern the thoughts of another
       person (usually by clever signals from an accomplice) [syn:
       mind reader, telepathist, thought-reader]