1. the central part of something
2. the most important or essential part of something
3. the hard central part of a fruit that contains the seeds

1. most important; central; essential

1. to remove the core from a fruit

Examples

• The Earth’s core is extremely hot.
• Reading and math are core subjects in school.
• She cored the apples before making pie.
• The core of the problem is lack of communication.
• Remove the core from the pineapple.
• Core values guide our decisions.
• The building’s core contains the elevators.
• At its core, the plan is simple.