core Definition 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

Definition of “core” - English Dictionary

"core" in American English

See all translations

corenoun [C]

 us   /kɔr, koʊr/
  • core noun [C] (FRUIT)

the hard, ​centralpart of some ​fruits, such as ​apples, which ​contains the ​seeds
  • core noun [C] (CENTER)

the ​center or most ​importantpart of something: Farmers ​formed the core of ​traditionalpartysupport. Safety ​concerns are at the core of the new ​federalpolicies.
earth science The core of the ​earth is ​itscenter, made up of a ​liquidinner core and a ​solidouter core.

coreadjective [not gradable]

 us   /kɔr, koʊr/
central; ​basic: We ​want to ​appeal to ​our core ​supporters without ​turning off ​undecidedvoters. The ​notion of ​love is one of the core ​values of ​ourcivilization. We have to ​concentrate on the core ​business, ​management said.

coreverb [T]

 us   /kɔr, koʊr/
  • core verb [T] (FRUIT)

to ​remove the core of ​fruit
(Definition of core from the Cambridge Academic Content Dictionary © Cambridge University Press)

"core" in British English

See all translations


uk   /kɔːr/  us   /kɔːr/
  • core noun (IMPORTANT PART)

C2 [S or U] the ​basic and most ​importantpart of something: The ​lack of ​governmentfunding is at the core of the ​problem.

expend iconexpend iconMore examples

  • core noun (CENTRE)

C2 [C] the hard ​centralpart of some ​fruits, such as ​apples, that ​contains the ​seeds: Don't ​throwyourapple core on the ​floor!
[C] the ​centre of a ​planet: The earth's core is a ​hot, ​moltenmix of ​iron and ​nickel.
[C] specialized physics The core of a ​nuclearreactor (= a ​device in which ​atoms are ​changed to ​produceenergy) is the ​place where ​fission (= the ​dividing of ​atoms)happens.
[C] specialized anatomy the ​muscles around ​your pelvis, ​hips, and abdomen that you use in most ​bodymovements: These ​exercises are ​designed to ​strengthenyour core.
[C] specialized geology a ​long, ​thin cylinder-shaped ​mass of ​material taken out of the ​earth for ​study


uk   /kɔːr/  us   /kɔːr/
  • core adjective (IMPORTANT)

most ​important or most ​basic: They are ​cutting back ​production of some of ​their core ​products.
core value, belief, issue, etc.
a ​value, ​belief, etc. that is ​basic and more ​important than any other: The ​finalstatusnegotiations would ​focus on the core ​issues of the ​peaceprocess.
core business/operations/activities
the most ​important or ​largestpart of a company's ​businessactivities: The company's core ​operationsincludeentertainment and ​aviation.
core curriculum/subjects/courses
the most ​importantparts of a ​course of ​study, that all ​students must ​learn
found in the ​mainpart of the ​body, but not the ​arms or the ​legs: Pilates is good for ​strengthening the core ​muscles.

coreverb [T]

uk   /kɔːr/  us   /kɔːr/
to ​remove the core from a ​piece of ​fruit: Peel and core the ​pears before ​cooking them.
(Definition of core from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)

"core" in Business English

See all translations

corenoun [C, usually singular]

uk   us   /kɔːr/
the most important or most basic ​part of something: the core of sth The core of the bank's ​business is in Hong at the core of sth The ​internet is ​increasingly at the core of the ​telecomsbusiness.

coreadjective [usually before noun]

uk   us   /kɔːr/
most important: core ​activities/​operationscore products/services They are ​cutting back ​production of some of their core ​products. core ​customers/​workerscore values For a ​company to ​achieve a ​competitiveadvantage it is important to have core ​values and a clearly ​definedpurpose. a core ​market/​business
(Definition of core from the Cambridge Business English Dictionary © Cambridge University Press)
What is the pronunciation of core?
Add Cambridge dictionaries to your browser to your website

“core” in Business English

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


a small amount of something that shows you what the rest is or should be like

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