must not.' name='description'> mustn't - definition and meaning

Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • Contraction of must not.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • phrase must not; used to indicate that something is forbidden or, in a tag question, that something is not necessary.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

must +‎ -n't

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