Official
Part of speech: adjective
Definition: Of or pertaining to an office or public trust Derived from the proper office or officer, or from the proper authority; made or communicated by virtue of authority Approved by authority; authorized. sanctioned by the pharmacopoeia; appointed to be used in medicine; officinal Discharging an office or function. Relating to an office; especially, to a subordinate executive officer or attendant. Relating to an ecclesiastical judge appointed by a bishop, chapter, archdeacon, etc., with charge of the spiritual jurisdiction.
Part of speech: noun
Definition: An office holder invested with powers and authorities. A person responsible for applying the rules of a game or sport in a competition.
Example sentence: I've had the honor and privilege of knowing Jeff for over 25 years. He's been a dear friend and a mentor, and there is no finer person in public service than Jeff Sessions. He's conducted himself with the greatest integrity of any public official I've ever met.
Functionary
Part of speech: noun
Definition: A person employed as an official in a bureaucracy (usually corporate or governmental) who holds limited authority and primarily serves to carry out a simple function for which discretion is not required.