Source : Webster's Revised Unabridged Dictionary (1913)

Vicegerent \Vice*ge"rent\, a. [Vice, a. + gerent: cf. F.
   viceg['e]rant.]
   Having or exercising delegated power; acting by substitution,
   or in the place of another. --Milton.

Vicegerent \Vice*ge"rent\, a. [Vice, a. + gerent: cf. F.
   viceg['e]rant.]
   Having or exercising delegated power; acting by substitution,
   or in the place of another. --Milton.

Vicegerent \Vice*ge"rent\, n.
   An officer who is deputed by a superior, or by proper
   authority, to exercise the powers of another; a lieutenant; a
   vicar. --Bacon.

         The symbol and vicegerent of the Deity.  --C. A. Young.

Source : WordNet®

vicegerent
     n : someone appointed by a ruler as an administrative deputy