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

bauble

a piece of bright but cheap jewellery

Word of the Day

Party Talk (The language of party chat)

by Kate Woodford,
December 23, 2014
​​​ With the party season in full swing (= at its busiest now), we consider the language of socializing (= enjoying yourself with other people). We’re looking especially at words and phrases which are used to describe the different ways that people behave at a party and the sort of conversations that party

Read More 

tweleb noun

December 22, 2014
informal a Twitter celebrity; (more specifically, someone who has more than 1,000 followers on Twitter) There were a few old and a few new faces, including a tweleb or two. Expect to see and hear more from these cool kids.

Read More