fast Meaning in the Cambridge English Dictionary
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “fast” in the English Dictionary

"fast" in British English

See all translations

fastadjective

uk   /fɑːst/  us   /fæst/

fast adjective (QUICK)

A1 moving or ​happeningquickly, or ​able to ​move or ​happenquickly: fast ​cars a fast ​swimmer Computers are getting faster all the ​time.UK The fast ​train (= one that ​stops at fewer ​stations and ​travelsquickly) to London ​takes less than an ​hour. If ​yourwatch or ​clock is fast, it ​shows a ​time that is ​later than the ​correcttime. specialized art used to refer to ​photographicfilm that ​allows you to take ​pictures when there is not much ​light or when things are ​movingquicklyfast and furious used to ​describe something that is ​full of ​speed and ​excitement: It's not a ​relaxingmovie - it's ​pretty fast and ​furious.
More examples

fast adjective (IMMORAL)

old-fashioned disapproving without ​moralprinciples: a fast ​crowd a fast woman

fast adjective (FIXED)

If the ​colour of a ​piece of ​clothing is fast, the ​colour does not come out of the ​cloth when it is ​washed.

fastadverb

uk   /fɑːst/  us   /fæst/
A2 quickly: The ​accident was ​caused by ​peopledriving too fast in ​badconditions. You'll have to ​act fast. Children's ​publishing is a fast-growing ​business.
More examples

fastadverb, adjective

uk   /fɑːst/  us   /fæst/

fastnoun [C]

uk   /fɑːst/  us   /fæst/
a ​period of ​time when you ​eat no ​food: Hundreds of ​prisonersbegan a fast in ​protest about ​prisonconditions.

fastverb [I]

uk   /fɑːst/  us   /fæst/
to ​eat no ​food for a ​period of ​time: One ​day a ​week he fasts for ​healthreasons.
(Definition of fast from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"fast" in American English

See all translations

fastadjective [-er/-est only]

 us   /fæst/

fast adjective [-er/-est only] (QUICK)

moving or ​happeningquickly or ​able to move or ​happenquickly: a fast ​car The fastest way to get there is by ​plane. If ​yourwatch or ​clock is fast, it ​shows a ​timelater than the ​realtime.

fastadjective, adverb [not gradable]

 us   /fæst/

fast adjective, adverb [not gradable] (ATTACHED)

connected or ​attached in a way that is not ​easilyunfastened: Tie the ​boat fast to the ​pier.

fastverb [I]

 us   /fæst/

fast verb [I] (NOT EAT)

to have a ​period of ​time when you ​eat no ​food: We will be fasting until ​sundowntomorrow.
fast
noun [C]  us   /fæst/
They ​organized a fast to ​drawattention to the ​issue of ​hunger.

fastadverb [-er/-est only]

 us   /fæst/

fast adverb [-er/-est only] (QUICKLY)

quickly: The ​accident was caused by ​peopledriving too fast in ​badconditions. This ​type of ​wildernessarea is ​disappearing fast.
(Definition of fast from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of fast?
Add Cambridge dictionaries to your browser to your website
Word of the Day

chestnut

a large tree with leaves divided into five parts and large round nuts that can be eaten

Word of the Day

In London but at the station: prepositions for talking about travel
In London but at the station: prepositions for talking about travel
by Liz Walter,
September 02, 2015
Several readers have asked for information on prepositions, so I will start with a blog post that looks at an area where they are really important: travel. The first thing to remember is that we use to (and not ‘in’) after the verb go: We are going to London. I went to

Read More 

parklet noun
parklet noun
August 31, 2015
a public outdoor space that may be associated with a local business but where anyone can sit Pop-up cafes in NY are what’s actually called parklets in many other places around the country.

Read More