AskDefine | Define core

Dictionary Definition



1 the center of an object; "the ball has a titanium core"
2 a small group of indispensable persons or things; "five periodicals make up the core of their publishing program" [syn: nucleus, core group]
3 the central part of the Earth
4 the choicest or most essential or most vital part of some idea or experience; "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story" [syn: kernel, substance, center, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty]
5 a cylindrical sample of soil or rock obtained with a hollow drill
6 an organization founded by James Leonard Farmer in 1942 to work for racial equality [syn: Congress of Racial Equality]
7 the central meaning or theme of a speech or literary work [syn: effect, essence, burden, gist]
8 the chamber of a nuclear reactor containing the fissile material where the reaction takes place
9 a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil v : remove the core or center from; "core an apple"

User Contributed Dictionary



Probably from coeur, from "cor" meaning "heart".




  1. A body of individuals; an assemblage.
  2. A miner's underground working time or shift.
  3. A Hebrew dry measure; a cor or homer.
  4. The central part of fruit, containing the kernels or seeds; as, the core of an apple or quince.
  5. The heart or inner part of a thing, as of a column, wall, rope, of a boil, etc.
  6. The center or inner part, as of an open space; as, the core of a square.
  7. The most important part of a thing; the essence; as, the core of a subject.
  8. The portion of a mold which shapes the interior of a cylinder, tube, or other hollow casting, or which makes a hole in or through a casting; a part of the mold, made separate from and inserted in it, for shaping some part of the casting, the form of which is not determined by that of the pattern.
  9. A disorder of sheep caused by worms in the liver.
  10. The bony process which forms the central axis of the horns in many animals.
  11. magnetic memory.
  12. One of severals parts in a computer processor.
  13. A deposit paid by the purchaser of a rebuilt part, to be refunded on return of a used, rebuildable part, or the returned rebuildable part itself. Said to be an acronym for Cash On REturn, but that may be a backronym.


central part of fruit, containing the kernels or seeds
one of severals parts in a computer processor


  1. To remove the core (4) of an apple.
  2. To extract a sample with a drill.

Extensive Definition

Core may refer to:
  • core, the single seed in the center of a cherry, peach, plum, olive, avocado or other fruit.
  • planetary core, in planetary science, the center of a planet
  • Core (or Kore), an alias of the goddess Persephone.
It may also refer to:

Science and academics

Computers and technology





core in German: Core
core in French: Core
core in Japanese: コア
core in Slovak: Core
core in Ukrainian: Ядро
core in Chinese: Core
core in Hungarian: Mag

Synonyms, Antonyms and Related Words

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