What is the meaning of Diocese?

An administrative division of the later Roman Empire, established by the Herodian tetrarchy.

A group of parishes administered by a bishop.

diocese (administrative district in some ancient Roman provinces)

diocese (ecclesiastical territorial division subject to the jurisdiction of a bishop or of his legitimate substitute)

diocese (administrative district in some ancient Roman provinces)

diocese (ecclesiastical territorial division subject to the jurisdiction of a bishop or of his legitimate substitute)

Source: wiktionary.org