unofficial
adjective
un·of·fi·cial
ˌən-ə-ˈfi-shəl 
also -ō-
: not authorized or acknowledged by a government, group, class, or society : not official
unofficial results
an unofficial policy
unofficially
adverb
Examples of unofficial in a Sentence
Recent Examples on the Web
Wisconsin’s unofficial state cocktail can now be eaten as a doughnut.
—
Elaine Rewolinski, jsonline.com, 13 Feb. 2026
Three episodes in the series discuss Galentine’s Day, beginning with season 2, episode 16, when the unofficial holiday celebration was first introduced.
—Jenny Porter Tilley, IndyStar, 13 Feb. 2026
There are already more than 3 million migrants from Myanmar in Thailand (though unofficial figures estimate double this number).
—Mayu Saini, Sourcing Journal, 11 Feb. 2026
Presidents Day is the unofficial start to warm-weather style sales, meaning now’s your chance to snag open-toed shoes for spring.
—Julia Morlino, Travel + Leisure, 11 Feb. 2026
See All Example Sentences for unofficial
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Elaine Rewolinski, jsonline.com, 13 Feb. 2026
Three episodes in the series discuss Galentine’s Day, beginning with season 2, episode 16, when the unofficial holiday celebration was first introduced.
—Jenny Porter Tilley, IndyStar, 13 Feb. 2026
There are already more than 3 million migrants from Myanmar in Thailand (though unofficial figures estimate double this number).
—Mayu Saini, Sourcing Journal, 11 Feb. 2026
Presidents Day is the unofficial start to warm-weather style sales, meaning now’s your chance to snag open-toed shoes for spring.
—Julia Morlino, Travel + Leisure, 11 Feb. 2026
See All Example Sentences for unofficial
Cite this Entry
“Unofficial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unofficial. Accessed 15 Feb. 2026.
Copy CitationMedical Definition
unofficial
adjective
un·of·fi·cial
ˌən-ə-ˈfish-əl
: not official
specifically
: of, relating to, or being a drug not described in the United States Pharmacopeia and National Formulary compare nonofficial, official
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