Adjective must has 1 sense
- must - highly recommended; "a book that is must reading"
Antonyms: inessential, unessential (indirect, via essential)
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Noun must has 3 senses
- must - a necessary or essential thing; "seat belts are an absolute must"
--1 is a kind of necessity, essential, requirement, requisite, necessary
- must - grape juice before or during fermentation
--2 is a kind of grape juice
- mustiness, must, moldiness - the quality of smelling or tasting old or stale or mouldy
--3 is a kind of staleness
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