noun \ˈnō-ˌnō\

: something that people are not supposed to do because it is not proper, safe, fashionable, etc.

plural no–no's or no–nos

Full Definition of NO-NO

:  something unacceptable or forbidden
:  no-hitter

First Known Use of NO-NO

circa 1942


Next Word in the Dictionary: nonobjectivePrevious Word in the Dictionary: nonny–nonnyAll Words Near: no-no
May 05, 2015
epigram Hear it
a short and clever poem or saying
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears