Source : Webster's Revised Unabridged Dictionary (1913)

Mediation \Me`di*a"tion\, n. [OE. mediacioun, F. m['e]diation.
   See {Mediate}, a.]
   1. The act of mediating; action or relation of anything
      interposed; action as a necessary condition, means, or
      instrument; interposition; intervention.

            The soul [acts] by the mediation of these passions.
                                                  --South.

   2. Hence, specifically, agency between parties at variance,
      with a view to reconcile them; entreaty for another;
      intercession. --Bacon.

Source : WordNet®

mediation
     n 1: negotiation to resolve differences conducted by some
          impartial party
     2: the act of mediating [syn: {intermediation}]