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A person with a high degree of skill in or knowledge of a certain subject.
adj. (ĕk′spûrt, ĭk-spûrt′)
Having, involving, or demonstrating skill in or knowledge of a certain subject. See Synonyms at proficient.

[Middle English, from Old French, experienced, from Latin expertus, past participle of experīrī, to try; see per- in Indo-European roots.]

ex′pert′ly adv.
ex′pert′ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.expertness - skillfulness by virtue of possessing special knowledge
skillfulness - the state of being cognitively skillful
professionalism - the expertness characteristic of a professional person
sophistication - being expert or having knowledge of some technical subject; "understanding affine transformations requires considerable mathematical sophistication"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.


Natural or acquired facility in a specific activity:
Informal: know-how.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sérfræîi; færni, snilli


[ˈekspɜːtnɪs] Npericia f
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005


(ˈekspəːt) adjective
(with at or on) skilled through training or practice. an expert car designer; I'm expert at map-reading; Get expert advice on plumbing.
a person who is an expert. an expert in political history / on ancient pottery.
ˈexpertly adverb
ˈexpertness noun
Kernerman English Multilingual Dictionary © 2006-2013 K Dictionaries Ltd.
References in classic literature ?
But while now upon so wide a field thus variously accomplished, and with such liveliness of expertness in him, too; all this would seem to argue some uncommon vivacity of intelligence.
A tolerable expertness in military movements is a business that requires time and practice.
As she knew her own expertness with the needle, this did not surprise her; but she felt some wonder that more and better work should produce the least reward.
In her letter, Welty supplies a lengthy quotation from Wilson's review in which he attempts to argue that urban, industrial cities ineluctably produce better craftsmanship, including literary craftsmanship, than Faulkner's provincial "antiquated community." Wilson concludes that Faulkner's provinciality "inevitably tempts him to be slipshod and has apparendy made it impossible for him to acquire complete expertness in an art that demands of the artist the closest attention and care." Welty correctly identifies this as pretentious and prejudiced humbuggery whose main rhetorical device is question begging.
Many children develop such expertness in silent counting that, in the absence of close observation and questioning, they are believed to have procedures much beyond those they do have.
Mistakes were almost always due to "lack of expertness," according to the first professional child-placing manual, which described child-placing as "exceedingly technical" work that "gives almost uniformly satisfactory results." (67) Until standards were firmly in place, child placers would stumble along with nothing to guide them but trial and error.
He admired the expertness of these artists so much, that he copied many of their paintings in order to learn as much as possible about the way these artists worked.
(1.) See, e.g., Joan Flynn, "Expertness for What?": The Gould Years at the NLRB and the Irrepressible Myth of the "Independent" Agency, 52 ADMIN.
(120) This test recognizes that even if an agency does not rely on its delegated policy-making authority--the exercise of which would make the agency's decision dominant--its policy decisions should be given respect consistent with "the degree of the agency's care, its consistency, formality, and relative expertness, and to the persuasiveness of the agency's position.
The higher a participant rates a counselor, the greater the perceived degree of expertness, attractiveness, and trustworthiness attributed to that counselor.
With a masterly expertness, Bell shows us the tensions among political coalitions and any results thereof.
More specifically, Hovland, Janis, and Kelley (1953) discovered that audiences reacted to cues indicating a communicator's intentions, expertness, and trustworthiness by judging a message more favorably when delivered by a source who was perceived as having a relatively high, rather than low, level of credibility.

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