unofficial
Britishadjective
-
not official or formal
an unofficial engagement
-
not confirmed officially
an unofficial report
-
(of a strike) not approved by the strikers' trade union
-
(of a medicinal drug) not listed in a pharmacopoeia
Other Word Forms
- unofficially adverb
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.
When it started to hit $100 billion in market cap, there were a few unofficial market-cap walls.
From Barron's • Mar. 27, 2026
McEvoy's time was faster than the unofficial 20.89 that Enhanced Games swimmer Kristian Gkolomeev claimed last year at a trial in the United States - for which he received $1m.
From BBC • Mar. 25, 2026
Some inside the company described the atmosphere as reminiscent of the company’s early days, when its name was still Facebook and its unofficial internal motto was “move fast and break things.”
From The Wall Street Journal • Mar. 22, 2026
Alhambra was another one of L.A.’s unofficial Chinatowns where everyone still spoke their native tongue.
From Los Angeles Times • Mar. 12, 2026
She’s dressed in jeans, a gray hoodie, and Sperry’s, the unofficial uniform of Poplar Springs Middle School students.
From "A Place at the Table" by Saadia Faruqi and Laura Shovan
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.
