Definitions

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

  • n. A person with a high degree of skill in or knowledge of a certain subject.
  • n. The highest grade that can be achieved in marksmanship.
  • n. A person who has achieved this grade.
  • adj. Having, involving, or demonstrating great skill, dexterity, or knowledge as the result of experience or training. See Synonyms at proficient.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Extraordinarily capable or knowledgeable.
  • adj. Characteristic of an expert.
  • n. A person with extensive knowledge or ability in a given subject.
  • n. A player ranking just below master.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Taught by use, practice, or experience, experienced; having facility of operation or performance from practice; knowing and ready from much practice; clever; skillful
  • n. An expert or experienced person; one instructed by experience; one who has skill, experience, or extensive knowledge in his calling or in any special branch of learning.
  • n.
  • n. A specialist in a particular profession or department of science requiring for its mastery peculiar culture and erudition.
  • n. A sworn appraiser.
  • transitive v. To experience.

from The Century Dictionary and Cyclopedia

  • Having had experience; experienced; practised; trained; taught by use, practice, or experience.
  • Skilful; dexterous; adroit; having facility acquired by practice.
  • Pertaining to or resulting from experience; due to or proceeding from one having practical knowledge or skill: as, expert workmanship; expert testimony.
  • Synonyms Adroit, Dexterous, Expert, etc. (see adroit); trained, practised. See skilful.
  • n. An experienced, skilful, or practised person; one skilled or thoroughly informed in any particular department of knowledge or art.
  • n. In law, a person who, by virtue of special acquired knowledge or experience on a subject, presumably not within the knowledge of men generally, may testify in a court of justice to matters of opinion thereon, as distinguished from ordinary witnesses, who can in general testify only to facts.
  • To experience.
  • [⟨ expert, n.] To examine (books, accounts, etc.) as an expert; have examined by an expert: as, the accounts have been experted.

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

  • n. a person with special knowledge or ability who performs skillfully
  • adj. of or relating to or requiring special knowledge to be understood
  • adj. having or showing knowledge and skill and aptitude

Etymologies

Middle English, from Old French, experienced, from Latin expertus, past participle of experīrī, to try; see per-3 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin expertus. (Wiktionary)

Examples

  • It just appears rather contradictory to have used the term expert there.

    Conservapedia - Recent changes [en]

  • Ezinearticles.com, which has published more than four million articles online on a wide variety of topics by what it calls "expert authors," is being pushed down Google Inc.'s search rankings in part because of "article vomit."

    Demoted Site Cites 'Article Vomit' as the Reason for Its Relegation

  • (Though the expert is an exception: Civil law courts tend to appoint their own experts, instead of letting parties bringthem.)

    The Volokh Conspiracy » Iowa Constitution’s Due Process Clause Bars Propensity-to-Commit-Crime Evidence

  • His reputation as a social media guru I hate the word 'expert,' '' he says keeps growing, largely for helping companies use tools such as Facebook and Twitter to personalize customer relationships and expand their brands.

    Boston.com Top Stories

  • Among them: testimony from a range of people, including Goldman Sachs CEO Lloyd Blankfein and Harlem Children's Zone creator Geoffrey Canada; new terminology drop the phrase "expert networks" into Google and see what comes up; a front row seat to an ideological battle between the US Supreme Court and the Securities and Exchange Commission; and 2,400 secretly recorded phone calls in what is without a doubt the broadest use ever of wiretaps in a white collar crime case.

    Robert Amsterdam: The Galleon Trial and the Future of Hedge Funds

  • No "expert" is going to turn up who can assess what you need in the way of clothing better than yourself.

    Alfred Augustus Glendening 1861-1903

  • The tipping point for being an "expert" is about 10,000 hours to be exact.

    10,000 Hours of Entrepreneur-ing

  • These are useful cautions because, as all these movies show, belief in authority of one kind or another -- including the authority of science -- was considerably stronger in that age than in the present day, when few leaders are trusted, and the word "expert" is almost invariably preceded by "so-called."

    March 2009

  • The Wall Street Journal's main Hugo Chavez antagonist is its self-styled Latin American "expert" Mary Anastasia O'Grady who makes up for in imagination and vitriol what she lacks in knowledge and journalistic integrity.

    Wall Street Journal Claims Chavez Oil Policy "Aims to Weaken US"

  • Nancy Killefer, a professional efficiency expert, is charged with scouring the federal budget to eliminate programs that don't work and improve those that do.

    Who Should Be The Next Administrator of NASA? - NASA Watch

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