must not

English

Alternative forms

• mustn't

Verb

must not (third-person singular simple present must not, no present participle, no simple past or past participle)

1. Used to indicate that something is forbidden.

   Synonyms: must refrain from, be not to

   Pedestrians must not cross the road until the light goes green.

Usage notes

Although must and have to are synonymous, there is a distinction in English between must not (indicating proscription) and not have to (indicating a lack of necessity).

Translations

must refrain from

• Czech: nesmět
• French: devoir ne pas
• Welsh: bod rhaid i ... beidio â, gorfod peidio â

Anagrams

• muttons