core 1 W3 AC / kɔ $ kɔr / 名词 [可数名词]

1 fruit the hard central part of a fruit such as an apple :

Remove the cores, and bake the apples for 40 minutes.

2 most important part the most important or central part of something

core of

The core of the book focuses on the period between 1660 and 1857.

Debt is at the core of the problem.

3 people a number of people who form a group which is very important to an organization :

The business needs a new core of trained administrators.

a core group of clients → hard core

4 to the core extremely or completely

shaken/shocked/thrilled to the core

When I heard the news, I was shaken to the core.

That woman is rotten to the core !

He was a bureaucrat to the core.

5 planet the central part of the Earth or any other planet

6 nuclear reactor the central part of a nuclear reactor