noun, often attributive \ˈkr\

Definition of CORE

:  a central and often foundational part usually distinct from the enveloping part by a difference in nature <the core of the city>: as
a :  the usually inedible central part of some fruits (as a pineapple); especially :  the papery or leathery carpels composing the ripened ovary in a pome fruit (as an apple)
b :  the portion of a foundry mold that shapes the interior of a hollow casting
c :  a vertical space (as for elevator shafts, stairways, or plumbing apparatus) in a multistory building
d (1) :  a mass of iron serving to concentrate and intensify the magnetic field resulting from a current in a surrounding coil
(2) :  a tiny doughnut-shaped piece of magnetic material (as ferrite) used in computer memories (3) :  a computer memory consisting of an array of cores strung on fine wires; broadly :  the internal memory of a computer
e :  the central part of a celestial body (as the earth or sun) usually having different physical properties from the surrounding parts
f :  a nodule of stone (as flint or obsidian) from which flakes have been struck for making implements
g :  the conducting wire with its insulation in an electric cable
h :  an arrangement of a course of studies that combines under basic topics material from subjects conventionally separated and aims to provide a common background for all students <core curriculum>
i :  the place in a nuclear reactor where fission occurs
a :  a basic, essential, or enduring part (as of an individual, a class, or an entity) <the staff had a core of experts> <the core of her beliefs>
b :  the essential meaning :  gist <the core of the argument>
c :  the inmost or most intimate part <honest to the core>
:  a part (as a thin cylinder of material) removed from the interior of a mass especially to determine composition

Origin of CORE

Middle English
First Known Use: 14th century

Other Archaeology Terms

Attic, Byzantine, Paleolithic, cairn, flint, horizon, neolithic, shard, stratum



: to remove a core from (a fruit)


Full Definition of CORE

transitive verb
:  to remove a core from <core an apple>
cor·er noun

First Known Use of CORE

15th century



Definition of CORE

chiefly Scottish
:  a group of people

Origin of CORE

perhaps alteration of Middle English chore chorus, company, perhaps from Latin chorus
First Known Use: 1622



Definition of CORE

Congress of Racial Equality

Other Government and Politics Terms

agent provocateur, agitprop, autarky, cabal, egalitarianism, federalism, hegemony, plenipotentiary, popular sovereignty, socialism
CORE[1] Defined for Kids


noun \ˈkr\

Definition of CORE for Kids

:  the usually inedible central part of some fruits (as a pineapple or pear)
:  the central part of a heavenly body (as the earth or sun)
:  the central or most important part of something <the core of a golf ball> <the core of a problem>



Definition of CORE for Kids

:  to remove the core from <core an apple>
Medical Dictionary


noun \ˈkō(ə)r, ˈk(ə)r\

Medical Definition of CORE

:  the central part of a body, mass, or part


Next Word in the Dictionary: CoreanPrevious Word in the Dictionary: CordyluridaeAll Words Near: core
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears