unserious

adjective

un·​se·​ri·​ous ˌən-ˈsir-ē-əs 

: not serious

unserious writers

unserious debates

… recognize the difference between serious and unserious warnings.

—Meg Greenfield

unseriously adverb

talking unseriously

unseriousness noun

Examples of unserious in a Sentence

Recent Examples on the Web

And please remember that a joyful classroom is not an unserious classroom. — Arkansas Online, 19 Sep. 2026

Guitar Center’s statement acknowledged the unserious submissions. — Wesley Stenzel, Entertainment Weekly, 18 Sep. 2026

Billions of dollars are flowing into pure research, years ahead of any product, at valuations that would have seemed unserious a decade ago. — Charles Yeomans, Forbes.com, 15 Sep. 2026

The key is to be short and memorable without being unserious. — Zach Helfand, New Yorker, 31 Aug. 2026

Word History

First Known Use

1655, in the meaning defined above

Rhymes for unserious

• aquarius
• cinereous
• gregarious
• hilarious
• malarious
• nefarious
• precarious
• vicarious
• carious
• scarious
• various
• multifarious