IPA: //daɪˈoʊsɪn//
KK: /daɪˈoʊsɪn/
Connected to a specific area of the church that is overseen by a bishop.
The diocesan council met to discuss the upcoming events in the community.
A religious leader who oversees a specific area called a diocese, usually responsible for the spiritual guidance and administration of the church in that region.
The diocesan was responsible for all the churches in the area.
Diocesan is formed from "diocesis" (from Latin, meaning a district or administration) and the suffix "-an" (meaning pertaining to). The word refers to something that pertains to a diocese, which is a district under the care of a bishop.
Think of a diocese as a specific 'district' ('diocesis') managed by a bishop, and '-an' indicates that it relates to that district.