core
/kɔːr/ nounDefinition
IMPORTANT PART [no plural] › the most important part of a system or principle: core values Better health care was at the core of the senator's campaign.
FRUIT [C] › the hard, central part of certain fruits, such as apples, which contains the seeds
PLANET [no plural] › the centre of a planet: the Earth's core → See also hard core
(Definition of core noun from the Cambridge Learner's Dictionary
© Cambridge University Press)
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