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
In the years since that race, Gaines has established herself as an unofficial face of conservative attacks on the NCAA, joining a March 2024 lawsuit accusing the association of violating Title IX by allowing trans athletes to compete.
—
Abby Monteil, Them., 28 Oct. 2025
Taking in the years 1956 to 1963, Through the Open Window serves as an unofficial companion to last year’s A Complete Unknown biopic.
—David Browne, Rolling Stone, 26 Oct. 2025
Believe it or not, many easy costume inspirations can be drawn from celebrities (not everyone goes all out like Hollywood's unofficial Halloween queen, Heidi Klum).
—Catherine Santino, PEOPLE, 25 Oct. 2025
Border officials and airlines often interpret passport damage differently, which makes any unofficial mark a travel risk.
—Lauren Dana Ellman, Travel + Leisure, 25 Oct. 2025
See All Example Sentences for unofficial
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Abby Monteil, Them., 28 Oct. 2025
Taking in the years 1956 to 1963, Through the Open Window serves as an unofficial companion to last year’s A Complete Unknown biopic.
—David Browne, Rolling Stone, 26 Oct. 2025
Believe it or not, many easy costume inspirations can be drawn from celebrities (not everyone goes all out like Hollywood's unofficial Halloween queen, Heidi Klum).
—Catherine Santino, PEOPLE, 25 Oct. 2025
Border officials and airlines often interpret passport damage differently, which makes any unofficial mark a travel risk.
—Lauren Dana Ellman, Travel + Leisure, 25 Oct. 2025
See All Example Sentences for unofficial
Cite this Entry
“Unofficial.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unofficial. Accessed 30 Oct. 2025.
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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