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

The Giants are looking to finish the unofficial first half of the season on a high note as Robbie Ray takes on Yoshinobu Yamamoto. —Michael Nowels, Mercury News, 13 July 2025

And now Boyd might be among the more underrated offseason moves in the majors based on the results of the unofficial first half. —Larry Fleisher, Forbes.com, 13 July 2025

That gets to the unofficial Rule 4: Don't wear your work uniform or hat in your car. —Jasmine Garsd, NPR, 12 July 2025

Galaxy’s Edge and Rise of the Resistance already released on the streaming service on May 4 in honor of the unofficial Star Wars holiday. —Brady MacDonald, Oc Register, 11 July 2025

Word History

First Known Use

1784, in the meaning defined above

Rhymes for unofficial

• artificial
• beneficial
• cicatricial
• interstitial
• nonjudicial
• nonofficial
• prejudicial
• sacrificial
• superficial
• extrajudicial
• semiofficial
• initial

Medical 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