1) Bishop 2) Bishop over a district 3) Bishop, often 4) French word used in English 5) Jurisdiction 6) Of or pertaining to a diocese 
• (a.) Of or pertaining to a diocese; as, diocesan missions. • (n.) The clergy or the people of a diocese. • (n.) A bishop, viewed in relation to his diocese; as, the diocesan of New York.
Di·oc'e·san adjective [ Late Latin dioecesanus : confer French diocésain .] Of or pertaining to a diocese; as, diocesan missions. 
[adj] - belonging to or governing a diocese 2. [n] - a bishop having jurisdiction over a diocese
adjective belonging to or governing a diocese
of or pertaining to a diocese.