UNOFFICIAL Synonyms: 33 Similar and Opposite Words

unofficial

adjective

Definition of unofficial

as in unauthorized

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of unofficial That might be the unofficial motto of the USC Trojans football program since the end of the Pete Carroll era, though with some slight tweaks here and there. — Ian Miller Outkick, FOXNews.com, 4 Oct. 2026 Two people were arrested in April 2023 for their involvement in an unofficial Chinese police station in Manhattan set up to monitor Chinese dissidents. — Josh Boswell, CBS News, 4 Oct. 2026 And arguably, there could be no more appropriate guest for the internet’s favorite unofficial beauty filter. — Anna Cafolla, Vogue, 3 Oct. 2026 Instead, Kushner began acting as an unofficial adviser to his father-in-law starting in May 2025, as the war reached a fever pitch. — Allegra Goodwin, CNN Money, 1 Oct. 2026 See All Example Sentences for unofficial

Recent Examples of Synonyms for unofficial

Adjective

Faced with a seemingly impossible challenge, a human might simply give up rather than resort to these kinds of unauthorized steps.

— Jeremy Kahn, Fortune, 7 Oct. 2026
OpenAI recently disclosed six cases of concerning model behavior, and Anthropic has also admitted its models gained unauthorized access to three organizations’ systems during testing.

— Chris Stokel-Walker, Scientific American, 6 Oct. 2026

Definition of unauthorized

Adjective

Despite this informal, jam-forward approach, however, Silk Fence appear to be chasing something; an understated but steady coherence gives direction to even their most wandering moments.

— Reed Jackson, SPIN, 6 Oct. 2026
In practice, that might mean designing for informal meetings as well as formal ones.

— Brendan Castle, Forbes.com, 6 Oct. 2026

Definition of informal

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unoccupied

unofficial

unordered

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“Unofficial.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/unofficial. Accessed 8 Oct. 2026.

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Synonyms of unofficial

adjective

Example Sentences

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