(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories; "each core has three wires passing through it, providing the means to select and detect the contents of each bit"
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"
the central meaning or theme of a speech or literary work
a small group of indispensable persons or things; "five periodicals make up the core of their publishing program"
an organization founded by James Leonard Farmer in 1942 to work for racial equality
the center of an object; "the ball has a titanium core"
the central part of the Earth
remove the core or center from; "core an apple"
a cylindrical sample of soil or rock obtained with a hollow drill