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 inedible central part of a fruit (“an apple core”).

CORE definition: the central part of a fleshy fruit, containing the seeds. See examples of core used in a sentence.

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

What does "core" mean to you? Explore its origins and how it became a metaphor for focus and foundation.

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.

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.

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).

CORE is an open scholarly infrastructure service aligned with the Principles of Open Scholarly Infrastructure (POSI). Beyond this shared foundation, CORE is defined by a set of distinctive characteristics that shape how it is built, governed, and operated.