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[n., v. ek-spurt; adj. ek-spurt, ik-spurt] /n., v. ˈɛk spɜrt; adj. ˈɛk spɜrt, ɪkˈspɜrt/
a person who has special skill or knowledge in some particular field; specialist; authority:
a language expert.
  1. the highest rating in rifle marksmanship, above that of marksman and sharpshooter.
  2. a person who has achieved such a rating.
possessing special skill or knowledge; trained by practice; skillful or skilled (often followed by in or at):
an expert driver; to be expert at driving a car.
pertaining to, coming from, or characteristic of an expert:
expert work; expert advice.
verb (used with object)
to act as an expert for.
Origin of expert
1325-75; Middle English (adj.) < Latin expertus, past participle of experīrī to try, experience
Related forms
expertly, adverb
expertness, noun
nonexpert, noun, adjective
proexpert, adjective
unexpert, adjective
1. connoisseur, master. 3. experienced, proficient, dexterous. See skillful.
3. unskillful. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for expert
  • Dan is an all around math-teaching expert and master video maker.
  • It had five leading voices, each one an expert in drug addiction and treatment.
  • Which isn't surprising, given his long and expert contribution to the health-care debate over the past two years.
  • After all, being a so-called expert is their claim to fame.
  • It used to be that the expert source on what was or wasn't a word was that school-day staple: the dictionary.
  • Don't experiment with other varieties without expert guidance.
  • Other than these alternatives though, there is plenty to discover here for strategy players of even expert ability.
  • Rather than hiring an ebonics expert to understand the lingo of drug dealers, they'd be better off hiring a former drug dealer.
  • No one who is not immersed and expert in a field and has become an expert in it is qualified to have a substantive opinion.
  • She is now a behavioral ecologist, an expert in how animals use sound.
British Dictionary definitions for expert


a person who has extensive skill or knowledge in a particular field
skilful or knowledgeable
of, involving, or done by an expert: an expert job
Derived Forms
expertly, adverb
expertness, noun
Word Origin
C14: from Latin expertus known by experience, from experīrī to test; see experience
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for expert

late 14c., from Old French expert and directly from Latin expertus, past participle of experiri "to try, test" (see experience). The noun sense of "person wise through experience" existed 15c., reappeared 1825. Related: Expertly.

Online Etymology Dictionary, © 2010 Douglas Harper
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