1

must

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verb \məs(t), ˈməst\

Definition of must

present tense and past tense, all persons

must

  1. auxiliary verb
  2. 1a :  be commanded or requested to you must stopb :  be urged to :  ought by all means to you must read that book

  3. 2 :  be compelled by physical necessity to one must eat to live :  be required by immediate or future need or purpose to we must hurry to catch the bus

  4. 3a :  be obliged to :  be compelled by social considerations to I must say you're looking wellb :  be required by law, custom, or moral conscience (see conscience 1) to we must obey the rulesc :  be determined to if you must go at least wait for med :  be unreasonably or perversely compelled to why must you argue

  5. 4 :  be logically inferred (see infer 1) or supposed to it must be time

  6. 5 :  be compelled by fate or by natural law to what must be will be

  7. 6 :  was or were presumably certain to :  was or were bound to if he did it she must have known

  8. 7 dialect :  may, shall —used chiefly in questions

  9. intransitive verb
  10. archaic :  to be obliged to go I must to Coventry — William Shakespeare

Examples of must in a sentence

  1. we must be quiet during the performance

Origin and Etymology of must

Middle English moste, from Old English mōste, past indicative & subjunctive of mōtan to be allowed to, have to; akin to Old High German muozan to be allowed to, have to


First Known Use: before 12th century


2

must

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noun \ˈməst\

Definition of must

  1. 1 :  an imperative need or duty :  requirement

  2. 2 :  an indispensable item :  essential exercise is a must

Origin and Etymology of must

see 1must


First Known Use: 1598


3

must

noun

Definition of must

  1. :  the expressed juice of fruit and especially grapes before and during fermentation; also :  the pulp and skins of the crushed grapes

Origin and Etymology of must

Middle English, from Old English, from Latin mustum


First Known Use: before 12th century


4

must

noun

Definition of must

  1. 1 :  musk

  2. 2 :  mold, mustiness

Origin and Etymology of must

Middle English (Scots) moist, from Middle French must, alteration of musc musk


First Known Use: 15th century



MUST Defined for English Language Learners

1

must

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verb \məs(t), ˈməst\

Definition of must for English Language Learners

  • —used to say that something is required by a rule or law

  • —used to say that someone should do something

  • —used to say that something is very likely


MUST Defined for Kids

1

must

play
helping verb \ˈməst\

Definition of must for Students

present and past all persons

must

  1. 1 :  to be commanded, requested, or urged to You must stop the noise at once.

  2. 2 :  to be required to A person must eat to live.

  3. 3 :  to be very likely to It must be time. I must have lost it.


2

must

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noun

Definition of must for Students

  1. :  something that is or seems to be required or necessary Sturdy shoes are a must for this hike.


Medical Dictionary

must

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noun \ˈməst\

Medical Definition of must

  1. :  the expressed juice of fruit and especially grapes before and during fermentation



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