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Meaning of don't

don't

Pronunciation: (dōnt), [key]
— v.
  1. contraction of do not.
  2. (except in some dialects). contraction of does not.
—n.
  1. customs, rules, or regulations that forbid something:Cf. do (def. 56). The boss has a long list of don'ts that you had better observe if you want a promotion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.