Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “core”

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.Places and locationsUnpleasant placesCentres of objectsImportant and essential thingsInformation and messages

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!Fruits and seeds and their partsCentres of objects [C] the centre of a planet: The Earth's core is a hot, molten mix of iron and nickel.Centres of objectsAstronomy - general words [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.Generating and pumping devices [C] specialized geology a long, thin cylinder-shaped mass of material taken out of the Earth for studySamples and examplesGeology - general words

core

adjective uk   // us  

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.Opinions, beliefs and points of view 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.Business and commerce - general words core curriculum/subjects/courses the most important parts of a course of study, that all students must doClasses, courses and coursework found in the main part of the body, without the arms and legs: Pilates is good for strengthening the core muscles.Substances and structures in the bodyThe human torso

core

verb [T] uk   /kɔːr/ us    /kɔːr/
to remove the core from a piece of fruit: Peel and core the pears before cooking them.Removing the skin or seed from fruit and vegetables
(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

nip

to press something quickly and quite hard between two objects, especially sharp objects such as teeth or nails

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More