Source : Webster's Revised Unabridged Dictionary (1913)

Umpirage \Um"pi*rage\ (?; 48), n. [From {Umpire}.]
   1. The office of an umpire; the power, right, or authority of
      an umpire to decide.

            The mind umpirage of the federal Union. --E.
                                                  Everett.

   2. The act of umpiring; arbitrament. --Bp. Hall.

Source : WordNet®

umpirage
     n 1: mediation by an umpire
     2: the act of umpiring; "the officiating was excellent" [syn: {officiation},
         {officiating}, {refereeing}]