Meaning & Definition of Core in English

1. A small group of indispensable persons or things

• "Five periodicals make up the core of their publishing program"

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"

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

7. The central meaning or theme of a speech or literary work

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• Now superseded by semiconductor memories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"

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

1. Remove the core or center from

• "Core an apple"