catalyst Meaning in the Cambridge English Dictionary Cambridge dictionaries logo
Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

Meaning of “catalyst” in the English Dictionary

"catalyst" in British English

See all translations

catalystnoun [C]

uk   /ˈkæt.əl.ɪst/  us   /ˈkæt̬.əl.ɪst/
(Definition of catalyst from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"catalyst" in American English

See all translations

catalystnoun [C]

 us   /ˈkæt̬·əl·ɪst/
a ​condition, ​event, or ​person that is the ​cause of an ​importantchange
biology, chemistry A catalyst is also a ​substance that ​causes or ​speeds a ​chemicalreaction without itself being ​changed.
(Definition of catalyst from the Cambridge Academic Content Dictionary © Cambridge University Press)

"catalyst" in Business English

See all translations

catalystnoun [C]

uk   us   /ˈkætəlɪst/
someone or something that causes a ​bigchange: the catalyst behind sth The catalyst behind this welcome ​trend has been the mighty Bill Gates.catalyst for sth An outside ​leader is often needed to ​serve as a catalyst for ​change.a catalyst to (do) sth The Government will ​act as a catalyst to ​promotecreativecollaboration between ​businesses.
(Definition of catalyst from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of catalyst?
Add Cambridge dictionaries to your browser to your website
There, their and they’re – which one should you use?
There, their and they’re – which one should you use?
by ,
April 27, 2016
by Liz Walter If you are a learner of English and you are confused about the words there, their and they’re, let me reassure you: many, many people with English as their first language share your problem! You only have to take a look at the ‘comments’ sections on the website of, for example, a popular

Read More 

Word of the Day

cracker

a thin, flat, hard biscuit, especially one eaten with cheese

Word of the Day

bio-banding noun
bio-banding noun
April 25, 2016
in sport, grouping children according to their physical maturity rather than their age ‘When we’re grouping children for sports, we do it by age groups, but the problem is that, within those age groups, we get huge variations in biological age,’ said Dr Sean Cumming, senior lecturer at the University of Bath’s department for

Read More