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See more synonyms for no-no on Thesaurus.com
noun, plural no-nos, no-no's. Informal.
  1. 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 for nono

restricted, banned, illegal, barred, illicit, contraband, unwarranted, wrongful, unofficial, unconstitutional, unlawful, unjustified, illegitimate, pirated, unapproved, obscenity, embargo, restriction, proscription, exclusion

Examples from the Web for nono

Historical Examples of nono

  • "He's bitterly hurt this time, Nono," said her aunt, gently.

    The Beloved Woman

    Kathleen Norris

  • Nono, I cantnot now; perhaps in a few months time, but not now.

  • Nono; he considers that mystery adds to his strong hold upon me.

    Married Life

    John Baldwin Buckstone

  • You could hug Nono and tell her secrets and what you wanted for luncheon.

    Mr. Achilles

    Jennette Lee

  • (118b, 1), but with the alteration: Nono anno ab inceptione religionis.

British Dictionary definitions for nono


  1. Luigi (luˈiːdʒi). 1924–90, Italian composer of 12-tone music
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for nono



1942, from reduplication of no.

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Online Etymology Dictionary, © 2010 Douglas Harper