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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Expert advice or opinion.
  • n. Skill or knowledge in a particular area. See Synonyms at art1.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. great skill or knowledge in a particular field or hobby
  • n. advice, or opinion, of an expert

from The Century Dictionary and Cyclopedia

  • n. An examination by experts; a survey by a board of skilled examiners of any obscure or doubtful ease in order to establish a foundation upon which the court may base an intelligent and definite judgment.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. skillfulness by virtue of possessing special knowledge


French, from expert, experienced; see expert.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowing from French expertise (Wiktionary)



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