Apostolic vicar , ∨ Vicar apostolic Meaning, Definition & Usage

Definitions
  1. . (R. C. Ch.) (a) A bishop to whom the Roman pontiff delegates a portion of his jurisdiction. (b) Any ecclesiastic acting under a papal brief, commissioned to exercise episcopal authority. (c) A titular bishop in a country where there is no episcopal see, or where the succession has been interrupted.

Webster 1913