noun

• An official keeper or recorder of records.
• An officer in a university who keeps enrollment and academic achievement records.
• (museums) The person responsible for record-keeping related to a museum's or archive's collection.
• (law) The chief executive officer of a judicial forum, in charge of the entire registry of the department.
• A doctor receiving advanced specialist training in some countries in order to become a consultant.
• (Internet) A service that manages the reservation of domain names.