Mustn't Definition

mŭsənt
contraction
Must not.
Webster's New World

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

If you see a hedgehog, you mustn't touch it.
You mustn't blame yourself.
We must go, mustn't we?
Wiktionary

Origin of Mustn't

  • must +"Ž -n't

    From Wiktionary

Mustn't Is Also Mentioned In