An expert is somebody who has a broad and deep understanding and competence in terms of knowledge, skill and experience through practice and education in a particular field or area of study.
EXPERT definition: a person who has special skill or knowledge in some particular field; specialist; authority. See examples of expert used in a sentence.
An expert is someone who knows a ton about the subject at hand. The adjective form of expert describes someone or something that has that special knowledge. If you get expert instruction, that means an expert is your teacher.
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2. possessing special skill or knowledge. 3. pertaining to or characteristic of an expert: expert advice.