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must

1 of 4

verb

məs(t),
ˈməst How to pronounce must (audio)
present tense and past tense, all persons must

auxiliary verb

1
a
: be commanded or requested to
you must stop
b
: be urged to : ought by all means to
you must read that book
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
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 (see conscience sense 1) 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
4
: be logically inferred (see infer sense 1) or supposed to
it must be time
5
: be compelled by fate or by natural law to
what must be will be
6
: was or were presumably certain to : was or were bound to
if he did it she must have known
7
dialect : may, shall
—used chiefly in questions

intransitive verb

archaic : to be obliged to go
I must to Coventry William Shakespeare

must

2 of 4

noun (1)

ˈməst How to pronounce must (audio)
1
: an imperative need or duty : requirement
2
: an indispensable item : essential
exercise is a must

must

3 of 4

noun (2)

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

must

4 of 4

noun (3)

1
: musk
2
: mold entry 3, mustiness

Synonyms

Verb

Noun (1)

Example Sentences

Verb we must be quiet during the performance

Word History

Etymology

Verb and Noun (1)

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

Noun (2)

Middle English, from Old English, from Latin mustum

Noun (3)

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

First Known Use

Verb

before the 12th century, in the meaning defined at sense 1a

Noun (1)

1598, in the meaning defined at sense 1

Noun (2)

before the 12th century, in the meaning defined above

Noun (3)

15th century, in the meaning defined at sense 1

Time Traveler
The first known use of must was before the 12th century

Phrases Containing must

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