Synonyms of must

Noun

1. must, necessity, essential, requirement, requisite, necessary

usage: a necessary or essential thing; "seat belts are an absolute must"

2. must, grape juice

usage: grape juice before or during fermentation

3. mustiness, must, moldiness, staleness

usage: the quality of smelling or tasting old or stale or mouldy

Adjective

1. must(prenominal), essential (vs. inessential)

usage: highly recommended; "a book that is must reading"

Definition and meaning of must (Dictionary)