Source : Webster's Revised Unabridged Dictionary (1913)

Mediator \Me"di*a`tor\, n. [L. mediator: cf. E. m['e]diateur.]
   One who mediates; especially, one who interposes between
   parties at variance for the purpose of reconciling them;
   hence, an intercessor.

         For there is one God, and one mediator between God and
         men, the man Christ Jesus.               --1 Tim. ii.
                                                  5.

Source : WordNet®

mediator
     n : a negotiator who acts as a link between parties [syn: {go-between},
          {intermediator}, {intermediary}, {intercessor}]