no-no

nounattested in dialogue

United States

Something that is forbidden, prohibited, discouraged or taboo.

noun

1
Something that is forbidden, prohibited, discouraged or taboo.
Smoking indoors is becoming a real no-no these days, in many places.
And a person of integrity observes all the good sportsmanship rules toward a beaten opponent. Integrity recognizes the integrity of other persons. To do otherwise would be to commit a no-no. And you don’t want to go around committing no-noes, do you?
Countless issues arise in family life every day, from the litany of no-noes showered on the toddler, to calling the preschooler in for his lunch.
2
A no-hitter; a game in which no batter on one of the teams got a hit.
He threw two no-nos in his career.

Forms

plural: no-nos, no-noes

no · Not any.No · A lake in South Sudan.no-good · Having no value, use or merit.

no-no · Something that is forbidden, prohibited, discouraged or taboo.

Noah · A figure in Abrahamic religions, believed to have built an…Nobel · A surname from Swedish, especially referring to Alfred Nobel,…nobility · A noble or privileged social class, historically accompanied…

The neighbouring pages — Alphabetical order follows the rules of the language, not byte values: an accent decides only between two otherwise identical words, and Spanish files Ñ as a letter of its own.