noun A district of the Roman Empire at the third echelon
noun A provincial government or office headed by an eparch in the Greek-speaking Eastern Roman Empire (akin to a prefecture governed by a prefect in the Latin-speaking Western Roman Empire)
noun An administrative sub-provincial unit in post-Ottoman independent Greece.
noun In pre-schism Christian Church, a province under the supervision of the metropolitan.
noun In Eastern Christendom, a diocese of a bishop.