unofficial
Britishadjective
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not official or formal
an unofficial engagement
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not confirmed officially
an unofficial report
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(of a strike) not approved by the strikers' trade union
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(of a medicinal drug) not listed in a pharmacopoeia
Other Word Forms
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Cher and Sonny were together for more than a decade, tying the knot in an unofficial ceremony in 1964, when she was just 17, before legally marrying in 1969.
From MarketWatch ● Jul. 27, 2026
At least 16,740 people were injured, and unofficial estimates put the number still missing in the thousands.
From Barron's ● Jul. 23, 2026
Thomas Giandomenico took unauthorized and unofficial photos of her husband’s body.
From Los Angeles Times ● Jul. 19, 2026
Brazilian authorities meanwhile have stepped up efforts to combat the crossings, but policing the remote frontier is extremely difficult, with smugglers using unofficial river crossings and jungle trails to evade authorities.
From The Wall Street Journal ● Jul. 14, 2026
The Tunisia Grand Prix felt like an unofficial debut for me.
From "Proud" by Ibtihaj Muhammad
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
