Real Dictionary

-core in British English
combining form in adjective: indicating the number of processing units working in parallel in a computer
combining form in countable noun: indicating a style of popular music or fashion

CORE in American English
central, basic, or most important; main
the hard, central part of an apple, pear, etc., that contains the seeds
to remove the core of
noun
noun acronym: Congress of Racial Equality

core in American English 1
noun: the central part of a fleshy fruit, containing the seeds

core in American English 2
noun: a small company or group of people, esp. a gang of miners or a small corps of workers

core in British English
noun: the central part of certain fleshy fruits, such as the apple or pear, consisting of the seeds and supporting parts
noun acronym for: Congress of Racial Equality
verb: to remove the core from (fruit)

core in the Oil and Gas Industry
noun: A core is cylindrical sample of rock.