Source : Webster's Revised Unabridged Dictionary (1913)

Telepathy \Te*lep"a*thy\, n. [Gr. ? far off + ?, ?, to suffer.]
   The sympathetic affection of one mind by the thoughts,
   feelings, or emotions of another at a distance, without
   communication through the ordinary channels of sensation. --
   {Tel`e*path"ic}, a. -- {Te*lep"a*thist}, n.

Source : WordNet®

telepathic
     adj : communicating without apparent physical signals