no-no

[noh-noh]

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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.

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Origin of no-no

1940–45, Americanism; reduplication of no¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

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.

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Online Etymology Dictionary, © 2010 Douglas Harper