Definition of mustn't in English:

mustn't

contraction

  • Must not.

    • ‘What we mustn't forget is that there are 116 different languages spoken.’
    • ‘There is much twisted and tangled negotiating over who we must and who we mustn't invite.’
    • ‘So when it all goes wrong, with costs through the roof and millions down the drain, it must be their fault, mustn't it?’
    • ‘We mustn't forget, he says, that these girls are victims as well.’
    • ‘But that mustn't be allowed to overshadow what is very good news indeed.’
    • ‘We mustn't, he stated, forget where we come from in this rapidly changing world.’
    • ‘She said I mustn't wear it too much at first so that Dad didn't notice and get angry.’
    • ‘He cannot make any promises, but at the same time he mustn't be seen to be frightened.’
    • ‘I mustn't complain - I hear it is not quite so warm in Scotland at the moment.’
    • ‘Often our city speaks for itself through its unique historic past, but we mustn't be complacent.’
    • ‘We mustn't be afraid to experiment and mustn't be ashamed or disheartened by any mishaps along the way.’
    • ‘I'm not arguing the university mustn't change and expand, but I think there's better ways to do it.’
    • ‘Still I jolly well expect a girl as pretty as you must have an awful lot of boyfriends, mustn't you?’
    • ‘But we mustn't be complacent as we have to maintain and improve the village to hold this place for the summer judging in July.’
    • ‘But we mustn't let this sense of outrage be turned against innocent people.’
    • ‘Oh yes, mustn't forget, I'm meeting up with Gillian after work tonight.’
    • ‘Most importantly, what you mustn't do is drop your standards just because you are getting desperate.’
    • ‘It's vastly better than it was 25 years ago but we really mustn't be complacent.’
    • ‘I'm a staunch believer in the old idea that one mustn't bottle up one's emotions.’
    • ‘So I thought, if it's man made, there must be someone driving it, mustn't there?’

Pronunciation:

mustn't

/ˈməs(ə)nt/