a person who has a comprehensive and authoritative knowledge of or skill in a particular area.
a financial expert
同义词：
specialistauthoritypunditoracleresource personadeptmaestrovirtuosomasterpast masterprofessionalgeniuswizardconnoisseuraficionadoone of the cognoscenticognoscentedoyensavantrare：proficientinformal：acebuffninjaprowhizhotshotold handalpha geekdab handmavencrackerjack
形容词
1
having or involving authoritative knowledge.
he had received expert academic advice
同义词：
skillfulskilledadeptaccomplishedtalentedfinemastermasterlybrilliantvirtuosobravuramagnificentmarvelouswonderfuloutstandinggreatexceptionalsuperlativeformidableexcellentdazzlingfirst-classfirst-rateelitesuperbproficientgoodableaptcapablecompetentcleverexperiencedpracticedqualifiedknowledgeablewell versedspecialistprofessionaldeftdexterousadroitau faitinformal：wizardacestellarclasscracktop-notchout of this worldmeanA1demongenius
