core meaning and definition

CORE noun

Definition of core (noun)

1. a small group of indispensable persons or things
   • "five periodicals make up the core of their publishing program"
   • synonyms: core group, nucleus
2. the center of an object
   • "the ball has a titanium core"
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: center, centre, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum
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: burden, effect, essence, gist
8. (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories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"
   • synonyms: magnetic core
9. the chamber of a nuclear reactor containing the fissile material where the reaction takes place
10. a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil

CORE verb

Definition of core (verb)

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