Pronunciation: /kɔːr/
noun the central or most important part of something
A1 The apple core was thrown in the trash.
A2 The core of the issue lies in poor communication.
B1 The core of the team consists of experienced professionals.
B2 The core values of the company are integrity and innovation.
C1 The core concept of the theory is difficult to grasp.
C2 The core of the argument was based on flawed assumptions.
adjective forming the central part of something
A1 The core principles of mathematics are addition, subtraction, multiplication, and division.
A2 The core features of the new software update include improved security and better performance.
B1 The core values of the company focus on integrity, teamwork, and customer satisfaction.
B2 The core components of the project need to be completed before moving on to the next phase.
C1 The core concepts of quantum physics are difficult to grasp without a strong background in mathematics.
C2 The core ideology of the political party is based on promoting social justice and equality for all citizens.
formal The core of the argument lies in the data presented by the research team.
informal At the core of the issue is poor communication between team members.
slang She's the core of our group, always keeping us together.
figurative The core of his beliefs is rooted in his upbringing.
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