Word.ws English Dictionary

must

/məst/

must verb: to do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence. Also the alternative spelling of musth.

Verb (1)

must (third-person singular simple present must, no present participle, simple past must, no past participle)

  1. (auxiliary, defective, modal, no-past-participle, no-present-participle) To do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.
    • You must arrive in class on time.
    • This door handle must be rotated fully.
  2. (auxiliary, defective, modal, no-past-participle, no-present-participle) To do with certainty; indicates that the speaker is certain that the subject will have executed the predicate.
    • If it has rained all day, it must be very wet outside.
    • Where would you have put the keyring? You couldn’t have lost it again! - I must have, because it's nowhere to be found.
  3. (auxiliary, defective, modal, no-past-participle, no-present-participle) Used to indicate that something is very likely, probable, or certain to be true.
    • The children must be asleep by now.
    • There's the doorbell. It must be Dad.

Noun (1)

must (plural musts)

  1. (auxiliary, defective, modal) Something that is mandatory, required or recommended.
    • If you're trekking all day, a map is a must.
    • "There are no musts in my life - I'm free, white, and twenty-one."1932, Helen Vinson, I Am a Fugitive from a Chain Gang
    Antonyms:
    no-no

Noun (2)

must (countable and uncountable, plural musts)

  1. (auxiliary, defective, modal) The property of being stale or musty.
  2. (auxiliary, defective, modal) Something that exhibits the property of being stale or musty.
  3. (auxiliary, defective, modal) Fruit juice that will ferment or has fermented, usually from grapes.
    • No sweet grape lies hidden here in the shade of its vine-leaves,
      No fermenting must fills and o'erflows the deep vats.c. 1874, Henry Wadsworth Longfellow, Ovid in Exile

Verb (2)

must (third-person singular simple present musts, present participle musting, simple past and past participle musted)

  1. (auxiliary, defective, modal, transitive) To make musty.
  2. (auxiliary, defective, intransitive, modal) To become musty.

Also used as

must is also the alternative spelling of musth.

must meaning in Hindi, Tamil, Urdu and Tagalog

must in Hindi

be required to
चाहिए cāhie, पड़ना paṛnā, होगा hogā

must in Tamil

be required to
வேண்டும் vēṇṭum
said about something that is very likely, probable, or certain to be true
வேண்டும் vēṇṭum
something mandatory
கட்டாயம் kaṭṭāyam

must in Urdu

be required to
چاہئے cāhie, پڑنا paṛnā, ہو گا hogā

must in Tagalog

be required to
dapat
More languagesFewer languages
must in Arabic
وَجَبَ wajaba, يَتَحَتَّم yataḥattam, يَلْزَم yalzam, لَا بُدَّ lā budda
must in Malay
mesti
must in Indonesian
harus
must in Persian
باید bâyad, پوراب purâb, مشتفشار moštafšār, باده bāde
must in Thai
ต้อง dtɔ̂ng
must in Vietnamese
phải
must in Myanmar
ရ ra.

Examples of must in a sentence

  • Everybody told me I must stop worrying, but I couldn't, because I knew that somehow there was still something wrong about the situation.
  • You really must come and see us soon, pal. - We'll see: I can borrow my dad's car, but I must bring it back before midnight.
  • The physician said that I must / had to / would have to stop smoking.
  • I said it must be pretty late and I really must go.
  • She's being taken to the police car now , so they must be going to arrest her.
  • Arise, and go into the city, and it shall be told thee what thou must do.1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC, Acts 9:6:

All 40 example sentences with must

Synonyms of must

Antonyms

Forms of must

Verb
third-person singular presentmust
pastmust
third-person singular presentmusts
present participlemusting
past participlemusted
pastmusted
first-person singular present (archaic)mote
second-person singular present (archaic)mote
second-person singular present (archaic)motest
third-person singular present (archaic)mote
plural present (archaic)mote
present subjunctive (archaic)mote
alternative form (dialectal)mus'
Noun
pluralmusts

Past tense of must: must

Origin of must

From Middle English moste ("must", literally, "had to", the past tense of Middle English moten (“to have to”)), from Old English mōste (“had to”), 1st & 3rd person singular past tense of mōtan (“to be allowed, be able to, have the opportunity to, be compelled to, must, may”), from Proto-Germanic *mōtaną. Cognate with Dutch moest (“had to”), German musste (“had to”), Swedish måste (“must, have to, be obliged to”). More at mote.

From Middle English must, from Old English must and Old French must, most, both from Latin mustum.

See musth.

Words formed from must

Phrases with must

Words that rhyme with must

25 more rhymesFewer rhymes

Questions about must

What does must mean?
Must means to do as a requirement; indicates that the sentence subject is required as an imperative or directive to execute the sentence predicate, with failure to do so resulting in a failure or negative consequence.
What is must in Hindi?
Must in Hindi is चाहिए (cāhie), पड़ना (paṛnā), होगा (hogā). See Must meaning in Hindi.
How do you use must in a sentence?
Everybody told me I must stop worrying, but I couldn't, because I knew that somehow there was still something wrong about the situation.
What part of speech is must?
Must can be a verb or a noun.
How do you pronounce must?
Must is pronounced /məst/.
What is the past tense of must?
The past tense of must is must.

Words near must in the dictionary

  1. Mussulwoman
  2. Mussulwomen
  3. mussurana
  4. mussuranas
  5. mussy
  6. must
  7. must get in front
  8. must have been the wind
  9. must have killed a Chinaman
  10. must needs
  11. must not

Source and license

Adapted from Wiktionary: must (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: en-us-must.ogg, LL-Q1860 (eng)-Vealhurl-must.wav.

Cite this entry: “must.” Word.ws, https://word.ws/must. Based on Wiktionary, CC BY-SA 4.0.