One who performs the functions of another; a substitute. Also the incumbent of an appropriated or impropriated ecclesias-tical benefice, as distinguished from the in-cumbent of a non-appropriated benefice, who is called a “rector.” Wharton. See Pinder v. Barr, 4 El. & Bl. 115. Vicar general. An ecclesiastical officer who assists the archbishop in the discharge of his office.