un·of·fi·cial | \ ˌən-ə-ˈfi-shəl also -ō- \

Definition of unofficial 

: not authorized or acknowledged by a government, group, class, or society : not official unofficial results an unofficial policy

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Other words from unofficial

unofficially adverb

Examples of unofficial in a Sentence

Recent Examples on the Web

Bob Eubanks, of Leesburg, whose son Jonathan was struck and killed at a bus stop in 1995, said in March that 300 schoolchildren have died or been injured at bus stops in Florida since then, an unofficial number not confirmed by the state. Steven Lemongello,, "Florida's year-round daylight saving time law on hold in Congress," 3 July 2018 Murdoch has a direct line to Trump and close relationships with several Fox News personalities who act as unofficial advisers to the White House. Sarah Ellison,, "Rupert Murdoch: The media mogul says goodbye to much of the company he built," 2 July 2018 Payson Arizona doesn’t have an official (or unofficial) most patriotic town, but Payson certainly makes a good case with its Fourth of July celebration. Scott Craven, azcentral, "Best Fourth of July fireworks, events around Arizona," 20 June 2018 In 1966, there was but one, the first and sadly unofficial. Susan Faust, San Francisco Chronicle, "Roundup of new children’s books, March 25," 22 Mar. 2018 The Crew Classic became the unofficial, early-season national championship event. Bill Center,, "Match races give Crew Classic new twist," 22 Mar. 2018 An unofficial mascot was present behind the scenes this year as Kingwood Park High School varsity baseball clinched win after win on their way to the school’s first apperance at state. Melanie Feuk, Houston Chronicle, "Kingwood Park baseball’s unofficial mascot keeps the dugout lighthearted as team approaches state semifinal June 7," 7 June 2018 In less than 24 hours, after an intruding goose was chased off the Comerica Park field during a rain delay and then flew into the facing of the second deck, the goose, or at least its plastic doppleganger, has become the Tigers’ unofficial mascot. Anthony Fenech, Detroit Free Press, "Detroit Tigers feeling goosed after series win over L.A. Angels," 31 May 2018 There's Pepe the Frog, the unofficial mascot of the alt-right. Emma Grey Ellis, WIRED, "Witches, Frog-Gods, and the Deepening Schism of Internet Religions," 3 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unofficial.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of unofficial

1784, in the meaning defined above

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Last Updated

12 Sep 2018

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Time Traveler for unofficial

The first known use of unofficial was in 1784

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More Definitions for unofficial


un·of·fi·cial | \ ˌən-ə-ˈfi-shəl \

Kids Definition of unofficial

: not official

Other words from unofficial

unofficially adverb


un·of·fi·cial | \ ˌən-ə-ˈfish-əl \

Medical Definition of unofficial 

: 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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