Core can be a noun, verb, or adjective, but is most often used as a noun to refer to the central or most important part of something (“the core of the issue,” “the Earth’s core”) or to the usually …

CORE meaning: 1. the basic and most important part of something: 2. the hard central part of some fruits, such…. Learn more.

The core of something such as a problem or an issue is the part of it that has to be understood or accepted before the whole thing can be understood or dealt with.

Definition of core noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

the central part of the earth:[singular] the pressure at the earth's core. the most important or essential part of anything: the core of the new curriculum for business majors.

Of basic importance; essential: "Virtually all cultures around the world use the word heart to describe anything that is core, central, or foundational" (Robert A. Emmons).

The core is made primarily of iron and nickel and has two parts — an inner solid core and an outer liquid core. The mantle is the layer of the Earth that overlies the core.

CORE Search is the engine that researchers, scholars, and others turn to for open access papers from around the world and for staying up to date on the latest scientific literature.

If you're looking for the most essential part or the very center of something, you're looking for its core. Like the inedible middle of an apple or your inner circle of core friends.

an area or point that is an equal distance from all points along an edge or outer surface the mountain rises from ground that is almost precisely at the island's core