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 core core /ˈkɔr/

noun

  1. () A small group of indispensable persons or things  ( core group , nucleus , core )
    a small group of indispensable persons or things
     Five periodicals make up the core of their publishing program
    five periodicals make up the core of their publishing program
  2. () The center of an object  ( core )
    the center of an object
     The ball has a titanium core
    the ball has a titanium core
  3. () The choicest or most essential or most vital part of some idea or experience  ( centre [Canadian, British] , gist , heart and soul , inwardness , kernel , marrow , meat , nitty-gritty , nub , center [American] , core , essence , heart , pith , substance , sum )
    the choicest or most essential or most vital part of some idea or experience
     The gist of the prosecutor's argument
    the gist of the prosecutor's argument
     The heart and soul of the Republican Party
    the heart and soul of the Republican Party
     The nub of the story
    the nub of the story
  4. () The central part of the Earth  ( core )
    the central part of the Earth
  5. () A cylindrical sample of soil or rock obtained with a hollow drill  ( core )
    a cylindrical sample of soil or rock obtained with a hollow drill
  6. A bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil  ( core )
    a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
     The transformer's efficiency was enhanced with the right magnetic core passing through its coil.
    The transformer's efficiency was enhanced with the right magnetic core passing through its coil.
  7. The chamber of a nuclear reactor containing the fissile material where the reaction takes place  ( core )
    the chamber of a nuclear reactor containing the fissile material where the reaction takes place
  8. (computing) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories  ( core , magnetic core )
    (computing) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
     Each core has three wires passing through it, providing the means to select and detect the contents of each bit
    each core has three wires passing through it, providing the means to select and detect the contents of each bit
  9. The central meaning or theme of a speech or literary work  ( burden , core , essence , effect , gist )
    the central meaning or theme of a speech or literary work

verb

  1. () Remove the core or center from  ( core )
    remove the core or center from
     Core an apple
    core an apple

 CORE

    noun

    1. An organization founded by James Leonard Farmer in 1942 to work for racial equality  ( Congress of Racial Equality , CORE )
      an organization founded by James Leonard Farmer in 1942 to work for racial equality