What does diocese mean?
A diocese is a defined geographical district within certain Christian churches — most notably the Roman Catholic, Anglican, and Eastern Orthodox traditions — placed under the spiritual and administrative authority of a bishop. Each diocese typically contains many parishes, which are smaller local communities served by individual priests. The word carries a formal, ecclesiastical register and appears most often in religious reporting, church governance documents, and historical writing. Its roots reach back to the administrative divisions of the late Roman Empire, where a dioecesis was a grouping of provinces under a vicarius; the early Church adopted this civic structure for its own organization, giving the modern term its enduring sense of ordered territorial oversight. Understanding diocese helps readers follow news about church leadership changes, diocesan synods, and the institutional geography of Christianity worldwide.
nounA diocese is a district or territory under the pastoral and administrative authority of a bishop in certain Christian churches, especially the Roman Catholic, Anglican, and Eastern Orthodox churches.
- A district under the jurisdiction of a bishop in Christian churches.
"The bishop has served the diocese of Canterbury for over a decade."
"She was appointed the first woman bishop in her diocese."
"The cathedral serves as the central church of the entire diocese."
Standard English plural; pronounced /ˈdaɪəsɪsiːz/, with an extra syllable added before the /z/ sound.
"The archbishop oversees several neighbouring dioceses within his province."
The word 'diocese' comes from a Greek term for a Roman imperial province — so every bishop today technically governs a piece of the ancient Roman Empire's administrative map.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diocese
Diocese derives from the Latin dioecesis, borrowed from the Greek dioikēsis meaning 'administration' or 'government', from dioikein ('to keep house, administer'). In the late Roman Empire it denoted a group of provinces under one governor, and the Church later adopted the term for a bishop's area of jurisdiction. English acquired the word via Old French in the medieval period, with the adjective form diocesan developing alongside it.
Related word forms
How diocese is actually used
Formal register; used primarily in religious and ecclesiastical contexts. The plural 'dioceses' is pronounced /ˈdaɪəsɪsiːz/.
Easily confused with diocese
A diocese is the larger territorial unit governed by a bishop, while a parish is a smaller local community within it led by a priest.