must modal verb, noun Meaning in Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of "must" - English Dictionary

See all translations

mustmodal verb

uk   us   strong /mʌst/ weak /məst/ /məs/

must modal verb (NECESSARY)

A2 used to show that it is necessary or very important that something happens in the present or future: Meat must be cooked thoroughly. I must get some sleep. You mustn't show this letter to anyone else. Luggage must not be left unattended (= it is against the rules).formal Must you leave so soon?formal "Must I sign this?" "Yes, you must." If you say that you must do something, you mean that you strongly intend to do something in the future: I must phone my sister. We must get someone to fix that wheel. I mustn't bite my nails. used for emphasis: I must say, you're looking extremely well. I must admit, I wasn't looking forward to it.B1 If you tell someone else that they must do something pleasant, you are emphasizing that you think it is a good idea to do that: You must come and stay with us for the weekend. We must meet for lunch soon.
More examples

must modal verb (PROBABLY)

B2 used to show that something is very likely, probable, or certain to be true: Harry's been driving all day - he must be tired. There's no food left - we must have eaten it all. When you got lost in the forest you must have been very frightened. "You must know Frank." "No, I don't."
More examples

mustnoun [C]

uk   us   strong /mʌst/ weak /məst/ /məs/ informal
something that is necessary: If you live in the country a car is a must.
(Definition of must modal verb, noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of must?
Add Cambridge dictionaries to your browser to your website

Definitions of “must” in other dictionaries

Word of the Day
avatar

an image that represents you in online games, chat rooms, etc. and that you can move around the screen

Word of the Day

The cake was made by my sister: how to use the passive in English.
The cake was made by my sister: how to use the passive in English.
by Liz Walter,
June 24, 2015
Look at these two sentences: My sister made the cake. The cake was made by my sister. Both these sentences mean the same. The first is an active sentence: it tells you what the sister did. The second is a passive sentence: it tells you what happened to the cake. Here are

Read More 

burger noun
burger noun
June 29, 2015
a menu on a computer screen comprising three short parallel horizontal lines which the user clicks to see options Definitely use a burger. You could put the settings in the burger menu too. Fix the settings to the bottom of the burger menu and use a vertically scrolling contact list that scrolls behind

Read More