WordNet (r) 3.0 (2006):

crosstalk
    n 1: the presence of an unwanted signal via an accidental
         coupling [syn: crosstalk, XT]

The Free On-line Dictionary of Computing (30 December 2018):

crosstalk

    Interference caused by two signals becoming
   partially superimposed on each other due to electromagnetic
   (inductive) or electrostatic (capacitive) coupling between the
   conductors carrying the signals.  A common example of
   crosstalk is where the magnetic field from changing current
   flow in one wire induces current in another wire running
   parallel to the other, as in a transformer.  Crosstalk can be
   reduced by using shielded cables and increasing the distance
   between conductors.

   (1995-12-20)