Meanings
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1
noun
a district under the pastoral and administrative authority of a bishop
The bishop spent her first year visiting every parish in the diocese.
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2
noun
a group of provinces forming an administrative division of the later Roman Empire; historical
Under Diocletian's reforms, several provinces were grouped into a larger diocese.
Thesaurus
Etymology
From Middle English diocise, through Old French and Late Latin diocesis, from Greek dioikesis, 'administration' or 'district.' The Roman term named a civil administrative division before the Christian church applied it to territory governed by a bishop.