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.

An office holder, a person holding an official position in government, sports, or other organization.

The rigid, perfunctory and literal adherence to official duties and regulations / Officials collectively

plural of officiousness

The act of officiating.

plural of officiation

The quality of being official.

(intransitive, transitive) To perform the functions of some office. / (intransitive, transitive, sports) To serve as umpire or referee.

A person appointed to office

(obsolete) Obliging, attentive, eager to please. / Offensively intrusive or interfering in offering advice and services.