don'ts, customs, rules, or regulations that forbid something: The boss has a long list of don'ts that you had better observe if you want a promotion.Cf. do1 (def. 56). Don ' t is the standard contraction for do …

Both don’t and doesn’t are contractions using the verb do and the word not. It's easier to see which one is the correct choice if you expand the contractions: don’t is a contraction of "do not" and doesn't is a …

Challenge yourself in 16 different languages. Define 'DONT'. See more meanings of 'DONT' with examples.