Definition of "vicegerent"
The official administrative deputy of a ruler, head of state, or church official.
Quotations
But why are not the kings, even Nero, Julian, Nebuchadnezzar, and Belshazzar, vicegerents of Christ, as mediator, as priest, as redeemer, as prophet, as advocate, presenting our prayers to God his father?
1644, Samuel Rutherford, Lex Rex, or The Law and the Prince, 1846, The Presbyterian's Armoury, Volume 3, 211
In 1574, James, Cardinal Savelli, the Cardinal Vicar, a prelate most exact in sacred and ecclesiastical ceremonies, appointed him his suffragan, or as it would now be termed, Vicegerent.
1876, The Month, volume 25, 139