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- DictionaryMust/məst/
modal
- 1. be obliged to; should (expressing necessity): "you must show your ID card"
- 2. expressing an opinion about something that is logically very likely: "there must be something wrong"
noun
- 1. something that should not be overlooked or missed: informal "this video is a must for parents"
used to show that it is necessary or very important that something happens in the present or future: Meat must be cooked thoroughly. I must get some sleep. You mustn't show this letter to anyone else. Luggage must not be left unattended (= it is against the rules).
3 days ago · SYNONYMS 1. must, ought, should express necessity or duty. must expresses necessity or compulsion: I must attend to those patients first. Soldiers must obey orders. ought (weaker than must) expresses obligation, duty, desirability: You ought to tell your mother. should expresses obligation, expectation, or probability: You are not behaving as ...
MUST definition: 1. used to say that it is necessary that something happens or is done: 2. used to show that you…. Learn more.
used to say that something is necessary or very important (sometimes involving a rule or a law) All visitors must report to reception. Cars must not be parked in front of the entrance (= it is not allowed). (formal) I must ask you not to do that again. You mustn't say things like that. I must go and get the kids from school.
A must is something that's so important it can't be missed or ignored. When you're taking kayaking lessons, a lifejacket is a must. Anything that is required is a must: drinking enough water is a must for being healthy. When you adopt a new dog, making sure he'll get along with your cat is a must.
n. Something that is absolutely required or indispensable: Promptness on the job is a must. Comfortable boots are a must when going on a hike. [Middle English moste, from Old English mōste, past tense of mōtan, to be allowed; see med- in Indo-European roots .] must 2. (mŭst) n. The quality or condition of being stale or musty.
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.
