Noah Webster's Dictionary (n.) A province, prefecture, or territory, under the jurisdiction of an eparch or governor; esp., in modern Greece, one of the larger subdivisions of a monarchy or province of the kingdom; in Russia, a diocese or archdiocese.

Multi-Version Concordance Eparchy (2 Occurrences) Acts 23:34 And having read it, and asked of what eparchy he was, and learned that he was of Cilicia, (DBY) Acts 25:1 Festus therefore, being come into the eparchy, after three days went up to Jerusalem from Caesarea. (DBY)