Meaning of 'core'

noun

a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil

noun

the chamber of a nuclear reactor containing the fissile material where the reaction takes place

noun

(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data

Synonyms: magnetic core

noun

the choicest or most essential or most vital part of some idea or experience

Synonyms: substance

noun

the central meaning or theme of a speech or literary work

Synonyms: burden essence effect gist

noun

a small group of indispensable persons or things

Example: "five periodicals make up the core of their publishing program"

Synonyms: nucleus core group

noun

the center of an object

Example: "the ball has a titanium core"

noun

the central part of the Earth

noun

a cylindrical sample of soil or rock obtained with a hollow drill

verb

to remove the core or center from

Example: "core an apple"