core - definition and synonyms

 
adjective 

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/kɔː(r)/
  1. most important, or most basic

    We need to focus on our core activities.

    core business (=a company’s main business activity):

    Selling insurance is still our core business.

    core to:

    The computer network is core to our operations.

    1. a.
      used for describing the most important members of a group

      2,000 students joined the core group of activists on the march.

       Synonyms and related words