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Definition of Must
1. Adjective. Highly recommended. "A book that is must reading"
2. Noun. A necessary or essential thing. "Seat belts are an absolute must"
3. Noun. Grape juice before or during fermentation.
4. Noun. The quality of smelling or tasting old or stale or mouldy.
Generic synonyms: Staleness
Derivative terms: Moldy, Musty, Musty, Musty, Musty
Definition of Must
1. v. i. or auxiliary To be obliged; to be necessitated; - - expressing either physical or moral necessity; as, a man must eat for nourishment; we must submit to the laws.
2. n. The expressed juice of the grape, or other fruit, before fermentation.
3. v. t. & i. To make musty; to become musty.
4. n. Being in a condition of dangerous frenzy, usually connected with sexual excitement; -- said of adult male elephants which become so at irregular intervals.
Definition of Must
1. Verb. (context: modal auxiliary defective) to do with certainty; (non-gloss definition indicates that the speaker is certain that the subject will have executed the predicate) ¹
2. Verb. (context: modal auxiliary defective) to do as a requirement; (non-gloss definition indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a negative consequence) ¹
3. Noun. Something that is mandatory or required ¹
4. Noun. Something that exhibits the property of being stale or musty ¹
5. Noun. Fruit juice that will ferment or has fermented, usually grapes ¹
6. Noun. A time during which male elephants exhibit increased levels of sexual activity and aggressiveness ''(also musth)'' ¹
¹ Source: wiktionary.com
Definition of Must
1. to become musty [v -ED, -ING, -S] - See also: musty