The circuit or extent of a bishop's jurisdiction; the district in which a bishop exercises his ecclesiastical authority.
The area over which a Bishop has jurisdiction. We are part of the Diocese of Missouri, a community of about 51 parishes and missions from the Mississippi River west to the cities of Jefferson City, Columbia and Kirksville.
Latin diocesis, district, government (Greek dioikesis, administration) -- the district under a bishop's jurisdiction. A diocesan is the bishop of a diocese.