Meaning of must
— auxiliary verb.
- to be obliged or bound to by an imperative requirement: I must keep my word.
- to be under the necessity to; need to: Animals must eat to live.
- to be required or compelled to, as by the use or threat of force: You must obey the law.
- to be compelled to in order to fulfill some need or achieve an aim: We must hurry if we're to arrive on time.
- to be forced to, as by convention or the requirements of honesty: I must say, that is a lovely hat.
- to be or feel urged to; ought to: I must buy that book.
- to be reasonably expected to; is bound to: It must have stopped raining by now. She must be at least 60.
- to be inevitably certain to; be compelled by nature: Everyone must die.
- to be obliged; be compelled: Do I have to go? I must, I suppose.
- (sometimes used with ellipsis of go, get, or some similar verb readily understood from the context): We must away.
- necessary; vital: A raincoat is must clothing in this area.
- something necessary, vital, or required: This law is a must.
- new wine; the unfermented juice as pressed from the grape or other fruit.
- mold; moldiness; mustiness: a castle harboring the must of centuries.
— Obs. Obs.
- musk, esp. a powder made from musk.
- to powder (the hair).
- must (Thesaurus)