Origin of must

1
before 900; Middle English most(e), Old English mōste (past tense); cognate with German musste. See mote2
SYNONYMS FOR must
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 you should. Children should be taught to speak the truth. They should arrive at one o'clock.

Definition for must (2 of 6)

must

2
[ muhst ]
/ mʌst /

noun

new wine; the unfermented juice as pressed from the grape or other fruit.

Origin of must

2
before 900; Middle English, Old English < Latin mustum, short for vīnum mustum new wine

Definition for must (3 of 6)

must

3
[ muhst ]
/ mʌst /

noun

mold; moldiness; mustiness: a castle harboring the must of centuries.

Origin of must

3
First recorded in 1595–1605; back formation from musty1

Definition for must (4 of 6)

must

4
[ muhst ]
/ mʌst /

noun

Definition for must (5 of 6)

must

5
[ muhst ]
/ mʌst /
Obsolete

noun

musk, especially a powder made from musk.

verb (used with object)

to powder (the hair).

Origin of must

5
1480–90; earlier moist < Middle French must, variant of musc musk

Definition for must (6 of 6)

musth

or must

[ muhst ]
/ mʌst /

noun

a state or condition of violent, destructive frenzy occurring with the rutting season in male elephants, accompanied by the exudation of an oily substance from glands between the eyes and mouth.

Origin of musth

1870–75; < Urdu mast < Persian: literally, drunk
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for must (1 of 5)

must

1
/ (mʌst, unstressed məst, məs) /

verb (takes an infinitive without to or an implied infinitive)

noun

an essential or necessary thingstrong shoes are a must for hill walking

Word Origin for must

Old English mōste past tense of mōtan to be allowed, be obliged to; related to Old Saxon mōtan, Old High German muozan, German müssen

British Dictionary definitions for must (2 of 5)

must

2
/ (mʌst) /

noun

mustiness or mould

Word Origin for must

C17: back formation from musty

British Dictionary definitions for must (3 of 5)

must

3
/ (mʌst) /

noun

the newly pressed juice of grapes or other fruit ready for fermentation

Word Origin for must

Old English, from Latin mustum new wine, must, from mustus (adj) newborn

British Dictionary definitions for must (4 of 5)

must

4
/ (mʌst) /

noun

a variant spelling of musth

British Dictionary definitions for must (5 of 5)

musth

must

/ (mʌst) /

noun

(often preceded by in) a state of frenzied sexual excitement in the males of certain large mammals, esp elephants, associated with discharge from a gland between the ear and eye

Word Origin for musth

C19: from Urdu mast, from Persian: drunk
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for must

musth


An annual period of heightened aggressiveness and sexual activity in male elephants.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Idioms and Phrases with must

must


see a must; show must go on.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.