Diocese (noun)

1. An administrative district of the Christian Church, typically headed by a bishop.
2. The geographical area or jurisdiction of a bishop.

Origin:

Early 17th century: from french diocèse or latin dioecesis, from greek dioikesis "administration, province", from dioikein "rule over", from dia "through" + oikos "house".

Examples:

1. The diocese covers several counties.
2. He was appointed bishop of the diocese.
3. The diocese is part of the larger church organization.
4. The diocese includes many parishes.
5. The diocese"s mission is to serve the community"s spiritual needs.