When you're an expert at something, you show expertise — or an exceptional knowledge of the subject. "He had expertise in accounting, having excelled in math, but he had even more expertise in dancing, his hobby since a small child."

Expertise has obvious roots in the word expert. Just about any interest or field has a place for experts. Just as one individual has expertise in world religions, another may have expertise in computer gaming. Working hard or immersing yourself in a specialty leads to expertise, and it comes through both study and hands-on experience.

Definitions of expertise
  1. noun
    skillfulness by virtue of possessing special knowledge
    synonyms: expertness
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    the expertness characteristic of a professional person
    being expert or having knowledge of some technical subject
    type of:
    the state of being cognitively skillful
Word Family