What is the term used to define 'extensive knowledge and skills in a specific field'?

Name: What is the term used to define 'extensive knowledge and skills in a specific field'?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

The term used to define extensive knowledge and skills in a specific field is expertise. Business savvy and experience may contribute to expertise, but they do not fully encompass the concept. Field knowledge is also related to expertise but is too general to fully define it.

What Is the Term Used to Define 'Extensive Knowledge and Skills