The Collaborative International Dictionary of English v.0.48:

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.

   Note: The existence of this ability has not been proven
         scientifically.-- Tel`e*path"ic, a. --
         Te*lep"a*thist, n.
         [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

telepathy
    n 1: apparent communication from one mind to another without
         using sensory perceptions [syn: telepathy, thought
         transference]

Moby Thesaurus II by Grady Ward, 1.0:

40 Moby Thesaurus words for "telepathy":
   ESP, answer, commerce, communication, communion, congress,
   connection, contact, conversation, converse, correspondence,
   dealing, dealings, exchange, information, interaction, interchange,
   intercommunication, intercommunion, intercourse, interplay,
   linguistic intercourse, message, mind reading, reply, response,
   social intercourse, speaking, speech, speech circuit,
   speech situation, talking, telepathic dream,
   telepathic hallucination, telepathic transmission,
   thought transference, touch, traffic, truck,
   two-way communication