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
An online discussion about forming an unofficial supporters section brought four guys together for a beer.
—
Rachel Roberts, Idaho Statesman, 5 Apr. 2026
In the five years since, Bill Murray, 75, has become something like an unofficial Huskies mascot.
—Andrew Carter, Chicago Tribune, 4 Apr. 2026
Saturday, April 4 (4/04), is an unofficial homage to Atlanta’s home area code, and a great time to celebrate our city.
—Aj Willingham, AJC.com, 3 Apr. 2026
Sidewalks were packed, and streets were buzzing Friday, as thousands of fans flooded downtown Denver for Colorado Rockies Opening Day — an unofficial holiday in the Mile High City.
—Tori Mason, CBS News, 3 Apr. 2026
See All Example Sentences for unofficial
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Rachel Roberts, Idaho Statesman, 5 Apr. 2026
In the five years since, Bill Murray, 75, has become something like an unofficial Huskies mascot.
—Andrew Carter, Chicago Tribune, 4 Apr. 2026
Saturday, April 4 (4/04), is an unofficial homage to Atlanta’s home area code, and a great time to celebrate our city.
—Aj Willingham, AJC.com, 3 Apr. 2026
Sidewalks were packed, and streets were buzzing Friday, as thousands of fans flooded downtown Denver for Colorado Rockies Opening Day — an unofficial holiday in the Mile High City.
—Tori Mason, CBS News, 3 Apr. 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 5 Apr. 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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