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no-no

[noh-noh]

SEE MORE SYNONYMS FOR no-no ON THESAURUS.COM

noun, plural no-nos, no-no's. Informal.

anything that is forbidden or not advisable, as because of being improper or unsafe: If you want to lose weight, rich desserts are a no-no.

Origin of no-no

1940–45, Americanism; reduplication of no¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for no-nos

obscenity, embargo, restriction, proscription, exclusion, constraint, veto, injunction, taboo, prevention, statute, decree, code, principle, law, order, procedure, control, restraint, stricture

Word Origin and History for no-nos

no-no

n.

1942, from reduplication of no.

Online Etymology Dictionary, © 2010 Douglas Harper