plural no-no's or no-nos
Synonyms of no-nonext
1
: something unacceptable or forbidden
2

Examples of no-no in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the same vein, abrasive cleaning materials are also a no-no. Melissa Locker, Southern Living, 7 Jan. 2026 Squeaking and clanking is a huge no-no for me, and thankfully there are no metal pieces to announce your comings and goings or nocturnal activities. Audrey Lee, Architectural Digest, 7 Jan. 2026 But flipping off Chiefs fans was a no-no. Nick Canepa, San Diego Union-Tribune, 20 Dec. 2025 That’s a no-no for notaries, who are legally required to be present (even virtually) for the signature and to confirm the identity of the person signing a document. Alex Harris, Miami Herald, 13 Dec. 2025 See All Example Sentences for no-no

Word History

First Known Use

circa 1942, in the meaning defined at sense 1

Time Traveler
The first known use of no-no was circa 1942

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Cite this Entry

“No-no.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/no-no. Accessed 11 Jan. 2026.

Kids Definition

no-no

noun
ˈnō-ˌnō
plural no-no's or no-nos
: something that is unacceptable or forbidden

More from Merriam-Webster on no-no

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