Arbitrator
Arbitrator ({not transcribed}) , noun
[Latin, from arbitrari: compare French arbitrateur.]
1.
A person, or one of two or more persons, chosen by parties who have a controversy, to determine their differences. See Arbitration.
2.
One who has the power of deciding or prescribing without control; a ruler; a governor.
Though Heaven be shut,
And Heaven's high Arbitrators sit secure.
Masters of their own terms and arbitrators of a peace.