4. core (in mining, geology, etc.) a cylindrical sample of earth, mineral, or rock extracted from the ground so that the strata are undisturbed in the sample.
5. core a lump of stone from which prehistoric humans struck flakes in order to make tools.
6. core the central portion of the earth, having a radius of about 2100 mi. (3379 km) and believed to be composed mainly of iron and nickel in a molten state.
7. core the region in a nuclear reactor that contains its fissionable material.
8. core an assemblage of small magnetized ferriterings used as a data-storage medium in some computers.
9. core a thickness of base metal beneath a cladding.
4. (noun)kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty 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. (noun)core a cylindrical sample of soil or rock obtained with a hollowdrill
6. (noun)Congress of Racial Equality, CORE an organization founded by James Leonard Farmer in 1942 to work for racial equality
7. (noun)effect, essence, burden, core, gist the central meaning or theme of a speech or literary work
8. (noun)core, magnetic core (computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories "each core has three wires passing through it, providing the means to select and detect the contents of each bit"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. (noun)core the chamber of a nuclear reactor containing the fissile material where the reaction takes place
10. (verb)core a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil
11. (verb)core remove the core or center from "core an apple"
3. (noun)core a Hebrew dry measure; a cor or homer
4. (noun)core the heart or inner part of a thing, as of a column, wall, rope, of a boil, etc.; especially, the centralpart of fruit, containing the kernels or seeds; as, the core of an apple or quince
5. (noun)core the center or inner part, as of an open space; as, the core of a square
6. (noun)core the most important part of a thing; the essence; as, the core of a subject
7. (noun)core the prtion of a mold which shapes the interior of a cylinder, tube, or other hollow casting, or which makes a hole in or through a casting; a part of the mold, made separate from and inserted in it, for shaping some part of the casting, the form of which is not determined by that of the pattern
11. (verb)core to form by means of a core, as a hole in a casting
Definitions of 'core'
The New Hacker's Dictionary
1. core Main storage or RAM. Dates from the days of ferrite-core memory;
now archaic as techspeak most places outside IBM, but also still used in
the Unix community and by old-time hackers or those who would sound like
them. Some derived idioms are quite current; in
core, for example, means ‘in memory’ (as opposed to
‘on disk’), and both core dump and the
core image or core file produced by one are terms in favor.
Some varieties of Commonwealth hackish prefer
store.
Definition of 'core'
The Standard Electrical Dictionary
1. core (a) The conductor or conductors of an electric cable. (See Cable Core.)
(b) The iron mass, generally central in an electro-magnet or armature, around which the wire is coiled. It acts by its high permeance to concentrate or multiply the lines of force, thus maintaining a more intense field. (See Armature--Magnet, Electro--Magnet, Field--Core, Laminated). In converters or transformers (See Converter) it often surrounds the wire coils.
Definitions of core 
Afrikaans: kern
Arabic: قَلْب، لُب، نواه
Bulgarian: сърцевина
Brazilian: núcleo
Czech: jádřinec, jádro
German: der Kern
Danish: kerne; midte; centrum; hj
Greek: πυρήνας
Spanish: corazón (fruta); núcleo
Estonian: südamik, tuum
Farsi: هسته؛ بخش درونی
Finnish: ydin
French: coeur
Hebrew: לִיבָּה
Hindi: भीतरी भाग, गुठली
Croatian: srž, sredina, jezgra
Hungarian: mag
Indonesian: inti
Icelandic: kjarni
Italian: torsolo; nucleo
Japanese: しん
Korean: 과심
Lithuanian: šerdis, vidurys, esmė
Latvian: [] kodols; serde; serdeni
Malay: teras
Dutch: binnenste
Norwegian: kjerne(hus)
Polish: rdzeń
Persian: هسته؛ بخش درونی
Pashto: دهر شى منځ (هسته)، مركز: 
Portuguese: caroço
Romanian: miez; centru
Russian: сердцевина; ядро
Slovak: jadrovník; jadro
Slovenian: jedro
Serbian: središte
Swedish: kärna
Thai: แกน
Turkish: göbek, çekirdek
Taiwanese: 果核，核心
Ukrainian: серцевина; ядро
Urdu: گودا، مغز
Vietnamese: nhân; lõi
Chinese: 果核，核心
