Wiktionary
n. 1 (label en Christianity) Any bishop. 2 (alternative case form of Vicar of Christ nodot=11 English), ''a title variously granted to the'' '''Holy Ghost''' ''and to the'' '''bishop of Rome'''.
Wikipedia
Vicar of Christ (from Latin Vicarius Christi) is the term used in different ways, with different theological connotations throughout history. As the original notion a vicar is of "earthly representative of God or Christ" but also used in sense of "person acting as parish priest in place of a real parson" The title is now used in Catholicism to refer to the bishops and more specifically to the Bishop of Rome (the pope).
Usage examples of "vicar of christ".
The soldiers beheld in their enemy and captive the vicar of Christ.
Constantia quickly informed me that the Borgia, Alexander VI, still held his position as Vicar of Christ.
Lourdusamy had always thought that this Christ was a bullying, authoritarian, merciless figure -- perhaps an icon perfectly suited to oversee this choice of a new Vicar of Christ.
If Mazzare did not know better, he would swear that the poker face of His Holiness Urban VIII, Vicar of Christ and head of the Roman Catholic Church, concealed a broad grin.
He was about to have a private audience with the Vicar of Christ himself, Pope John-Paul V.
Cardinal Pole was also much grieved by the rift between Philip and the Pope, and wrote begging the King not to make war on the Vicar of Christ.