Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “core”

See all translations

core

noun uk   /kɔːr/ us    /kɔːr/

core noun (IMPORTANT PART)

C2 [S or U] the basic and most important part of something: The lack of government funding is at the core of the problem.
More examples

core noun (CENTRE)

C2 [C] the hard central part of some fruits, such as apples, which contains the seeds: Don't throw your apple core on the floor! [C] the centre of a planet: The Earth's core is a hot, molten mix of iron and nickel. [C] specialized physics The core of a nuclear reactor (= a device in which atoms are changed to produce energy) is the place where fission (= the dividing of atoms) happens. [C] specialized geology a long, thin cylinder-shaped mass of material taken out of the Earth for study

core

adjective 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 final status negotiations would focus on the core issues of the peace process.core business/operations/activities the most important or largest part of a company's business activities, which it depends on in order to continue trading: The company's core operations include entertainment and aviation.core curriculum/subjects/courses the most important parts of a course of study, that all students must do found in the main part of the body, without the arms and legs: Pilates is good for strengthening the core muscles.

core

verb [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)
What is the pronunciation of core?
Add Cambridge dictionaries to your browser to your website

Definitions of “core” in other dictionaries

Word of the Day

be in/out of luck

to be able/unable to have or do what you want

Word of the Day

A certain je ne sais quoi: French words and phrases used in English

by Liz Walter,
January 21, 2015
It is an odd irony that the more sophisticated your use of English is, the more likely you are to use French words and phrases. Or, to be more accurate, ones you know to be French – words such as ballet, au pair, abattoir, fiancé, café, and restaurant are so entrenched in

Read More 

micro pig noun

January 26, 2015
an extremely small pig, bred to be a pet Micro pigs have become popular pets recently, with famous owners including Victoria Beckham, Paris Hilton and Olympic diver, Tom Daley.

Read More