UNOFFICIAL Synonyms: 33 Similar and Opposite Words

unofficial

adjective

Definition of unofficial

as in unauthorized

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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 For many, the day will be for rest and relaxation, and also serve as the unofficial end of summer. — Brayden Garcia, Fort Worth Star-Telegram, 3 Sep. 2026 Happy Friday, and welcome to Labor Day weekend, the unofficial end of summer. — Ronnie Li, USA Today, 3 Sep. 2026 The Telluride Film Festival, the unofficial launch of the Oscar race in North America, will kick off its 53rd edition on Friday and run through Monday. — Scott Feinberg, HollywoodReporter, 3 Sep. 2026 With nearly 5 million pre-orders worldwide, the game’s release on November 19 is poised to take a sizable chunk of the working population with it, a phenomenon tantamount to an unofficial holiday, as the Wall Street Journal tells it. — Joe Wilkins, Futurism, 2 Sep. 2026 See All Example Sentences for unofficial

Recent Examples of Synonyms for unofficial

Adjective

More than two dozen law enforcement officials, from crime analysts to chiefs of police, have been charged with violating their oaths of office and conducting unauthorized searches within the Flock Safety system in Georgia in the past few months.

— Irene Wright, USA Today, 4 Sep. 2026
In March, for example, Barksdale Air Force Base in Louisiana, which houses long-range B-52 bombers, went into lockdown after numerous unauthorized drones were spotted hovering over sensitive areas of the base.

— Seth G. Jones, Foreign Affairs, 3 Sep. 2026

Definition of unauthorized

Adjective

Language in your next lease renewal covering accent walls, hardware swaps or pre-move-out inspections, a signal that landlords are formalizing what has been an informal negotiation.

— Ryan Brennan, Charlotte Observer, 8 Sep. 2026
In a joint statement issued Tuesday, the Consultative Shipping Group (CSG) — an informal cooperation between the maritime bodies of 18 shipping nations across the globe — noted that more than 80% of global trade is transported by sea.

— Chloe Taylor, CNBC, 8 Sep. 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 11 Sep. 2026.

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Synonyms of unofficial

adjective

Example Sentences

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