plural no-no's or no-nos
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.
Items Stored on Top of Kitchen Cabinets Storing things on top of kitchen cabinets is another feng shui no-no, according to Roynon. Maria Sabella, Better Homes & Gardens, 14 Oct. 2025 For a candidate to alienate the most powerful individuals in their political party even before a race gets going seriously is an unheard-of no-no. Thomas Elias, Mercury News, 14 Oct. 2025 Mixing wet and dry items is a no-no. Catharine Kaufman, San Diego Union-Tribune, 13 Oct. 2025 In my eyes, traveling with open-toed shoes is a big no-no. Asia London Palomba, Travel + Leisure, 4 Oct. 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 18 Oct. 2025.

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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