Of or pertaining to office or the performance of the duties of an office: as, official duty; official cares or responsibility.Derived from the proper office or officer, or from the proper authority; made or communicated by virtue of authority; hence, authorized: as, an official statement or report.Performing duties or offices; rendering useful service; ministering.n. One who is invested with an office of a public nature; one holding a civil appointment: as, a government official; a railway official.n. In English ecclesiastical law, a person appointed as judge by a bishop, chapter, or archdeacon, to hear causes in the ecclesiastical courts.In pharm., authorized by the pharmacopœia of some country or countries: as, an official drug; an official preparation. In this sense recent, displacing the broader term officinal.