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.) < Latinexpertus, past participle of experīrī to try, experience
Related forms
ex·pert·ly, adverb
ex·pert·ness, noun
non·ex·pert, noun, adjective
pro·ex·pert, adjective
un·ex·pert, adjective
Synonyms 1. connoisseur, master. 3. experienced, proficient, dexterous. See skillful.
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.