2 entries found for must.
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must[1,helping verb] must[2,noun]

Main Entry: ¹must
Pronunciation: ms(t), mst
Function: helping verb
Inflected Form(s): present & past all persons must
1 : is commanded, requested, or urged to <the train must stop> <you must read that book>
2 : is forced, required, or obliged to <leaves must fall> <one must eat to live> <we must be quiet>
3 : is determined to <if you must go>
4 : is very likely to <it must be time> <must have lost it>
5 : is certain to <the bus must be coming>