1. to be obliged or bound to by an imperative requirement: I must keep my word.
2. to be under the necessity to; need to: Animals must eat to live.
3. to be required or compelled to, as by the use or threat of force: You must obey the law.
4. to be compelled to in order to fulfill some need or achieve an aim: We must hurry if we're to arrive on time.
5. to be forced to, as by convention or the requirements of honesty: I must say, that is a lovely hat.
6. to be or feel urged to; ought to: I must buy that book.
7. to be reasonably expected to; is bound to: It must have stopped raining by now. She must be at least 60.
8. to be inevitably certain to; be compelled by nature: Everyone must die.

9. to be obliged; be compelled: Do I have to go? I must, I suppose.
10. (sometimes used with ellipsis of go, get, or some similar verb readily understood from the context): We must away.

11. necessary; vital: A raincoat is must clothing in this area.

12. something necessary, vital, or required: This law is a must.

1. new wine; the unfermented juice as pressed from the grape or other fruit.

1. mold; moldiness; mustiness: a castle harboring the must of centuries.

1. musk, especially a powder made from musk.

2. to powder (the hair).

1. used as an auxiliary to express obligation or compulsion: you must pay your dues . In this sense, must does not form a negative. If used with a negative infinitive it indicates obligatory prohibition
2. used as an auxiliary to indicate necessity
3. used as an auxiliary to indicate the probable correctness of a statement
4. used as an auxiliary to indicate inevitability
5. (used as an auxiliary to express resolution)
• on the part of the speaker when used with I or we
• on the part of another or others as imputed to them by the speaker, when used with you, he, she, they, etc
6. used as an auxiliary to express conviction or certainty on the part of the speaker
7. used with an implied verb of motion to express compelling haste

8. an essential or necessary thing

1. mustiness or mould

1. the newly pressed juice of grapes or other fruit ready for fermentation

1. a variant spelling of musth

1. indicating that something is highly recommended or desirable

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