Pronunciation: ( —n., v.ek'spûrt; —adj.ek'spûrt, ik-spûrt'),[key] —n. 1. a person who has special skill or knowledge in some particular field; specialist; authority: a language expert. 2. Mil. a. the highest rating in rifle marksmanship, above that of marksman and sharpshooter.
b. a person who has achieved such a rating.
—adj. 1. possessing special skill or knowledge; trained by practice; skillful or skilled (often fol. by in or at): an expert driver; to be expert at driving a car. 2. pertaining to, coming from, or characteristic of an expert: expert work; expert advice.