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1

must

play
verb, \məs(t), ˈməst\

Simple Definition of must

  • —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

Source: Merriam-Webster's Learner's Dictionary

Full Definition of must

present & past all persons must

  1. verbal auxiliary
  2. 1 a :  be commanded or requested to <you must stop> b :  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. 3 a :  be obliged to :  be compelled by social considerations to <I must say you're looking well> b :  be required by law, custom, or moral conscience to <we must obey the rules> c :  be determined to <if you must go at least wait for me> d :  be unreasonably or perversely compelled to <why must you argue>

  5. 4 :  be logically inferred 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 dial :  may, shall —used chiefly in questions

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

Examples of must in a sentence

  1. <we must be quiet during the performance>



Origin 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

Rhymes with must


2

must

play
noun \ˈməst\

Definition of must

  1. 1 :  an imperative need or duty :  requirement

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



1616

First Known Use of must

1616


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 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 of must

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


First Known Use: 15th century



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

play
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

play
noun \ˈməst\

Medical Definition of must

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





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