Canon

The term comes from the Greek word kannon, that means "measuring rod or ruler." In the Church we speak of canon law, the canon of Scripture, and people called canons. The canon of Scripture refers to the books of the Bible that are accepted as genuine and inspired by God. When used in reference to people, a canon is the title of a priest (or deacon) who either serves on the staff of a cathedral, or who has exhibited exemplary service to a diocese.