The meaning of UNOFFICIAL is not authorized or acknowledged by a government, group, class, or society : not official. How to use unofficial in a sentence.

UNOFFICIAL definition: 1. not official; not from a person in authority, the government, etc.: 2. not official; not from a…. Learn more.

Definition of unofficial adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

UNOFFICIAL definition: not official or formal See examples of unofficial used in a sentence.

Jan 18, 2026 · Implicitly true but withheld and/or contradicted by authority. The unofficial reason for invading the nation, however, was to control their resources. Not acting with official authority.

1. Not official: the unofficial election results. 2. Not acting officially: an unofficial adviser.

An unofficial action is not authorized, approved, or organized by a person in authority.

Factsheet What does the word unofficial mean? There are five meanings listed in OED's entry for the word unofficial. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Unofficial refers to something that is not formally acknowledged, authorized, or accepted by a person, institution, or governing body. It can relate to rules, actions, statements, events, roles, or positions …

adjective not having official authority or sanction “a sort of unofficial mayor” “an unofficial estimate” “he participated in an unofficial capacity” synonyms: unauthorised, unauthorized