Formal and Unauthorized

Opposite meaning words

Formal adjective - Following or agreeing with established form, custom, or rules.

Usage example: a formal contract that was legally binding

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Unauthorized is an antonym for formal.

Unauthorized adjective - Not endowed with authority.

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Formal is an antonym for unauthorized.

Nearby Word: unauthorised

Cite this Source

Unauthorized and Formal. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/formal/unauthorized

Formal & Unauthorized. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/formal/unauthorized>.

Unauthorized or Formal. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/formal/unauthorized.

Google Ngram Viewer shows how "formal" and "unauthorized" have occurred on timeline