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Definition of 'core'

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  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"
       Synonyms: 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"
       Synonyms: 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
       Synonyms: Congress of Racial Equality
  7. the central meaning or theme of a speech or literary work
       Synonyms: 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


  1. remove the core or center from; "core an apple"

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