expert in

expert

[n., v. ek-spurt; adj. ek-spurt, ik-spurt]
noun
1.
a person who has special skill or knowledge in some particular field; specialist; authority: a language expert.
2.
Military.
a.
the highest rating in rifle marksmanship, above that of marksman and sharpshooter.
b.
a person who has achieved such a rating.
adjective
3.
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.
4.
pertaining to, coming from, or characteristic of an expert: expert work; expert advice.
verb (used with object)
5.
to act as an expert for.

Origin:
1325–75; Middle English (adj.) < Latin expertus, past participle of experīrī to try, experience

expertly, adverb
expertness, noun
nonexpert, noun, adjective
proexpert, adjective
unexpert, adjective


1. connoisseur, master. 3. experienced, proficient, dexterous. See skillful.


3. unskillful.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
expert (ˈɛkspɜːt)
 
n
1.  a person who has extensive skill or knowledge in a particular field
 
adj
2.  skilful or knowledgeable
3.  of, involving, or done by an expert: an expert job
 
[C14: from Latin expertus known by experience, from experīrī to test; see experience]
 
'expertly
 
adv
 
'expertness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

expert
late 14c., from L. expertus, pp. of experiri "to try, test" (see experience). The n. sense of "person wise through experience" existed 15c., reappeared 1825.
Online Etymology Dictionary, © 2010 Douglas Harper
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