Noah Webster's New International Dictionary of the English Language

1. (n.) of or pertaining to an office or public trust; as, official duties, or routine.

2. (n.) Derived from the proper office or officer, or from the proper authority; made or communicated by virtue of authority; as, an official statement or report.

3. (n.) Approved by authority; sanctioned by the pharmacopoeia; appointed to be used in medicine; as, an official drug or preparation. Cf. Officinal.

4. (n.) Discharging an office or function.

5. (a.) One who holds an office; esp., a subordinate executive officer or attendant.

6. (n.) An ecclesiastical judge appointed by a bishop, chapter, archdeacon, etc., with charge of the spiritual jurisdiction.