From Longman Dictionary of Contemporary Englishexpertex‧pert1 /ˈekspɜːt $ -ɜːrt/ ●●●S3W2AWL noun [countable]GOOD ATKNOW somethingsomeone who has a special skill or special knowledge of a subject, gained as a result of training or experienceexpert onHe’s a world expert on marine mammals.expert inan expert in statisticsmedical/technical/financial etc expertTests should be administered by a medical expert.GRAMMAR: Prepositions with expert• Someone is an expert on a subject or issue: He’s an expert on the Cold War.✗Don’t say: He’s an expert of the Cold War.• Someone is an expert in a field of study or an activity: She’s an expert in family law.✗Don’t say: She’s an expert of family law.COLLOCATIONSadjectivesa leading expert (=one of the best and most respected)He is one of the country’s leading experts on Islam.a world/international expert (=one who is known in many different countries)She is a world expert on tropical diseases.an independent expert (=someone who is not controlled by, or does not receive money from, an organization or the government)The authorities called in an independent expert to advise them.a medical/legal/financial etc expert (=someone who has special skills related to a particular job or subject)Medical experts agree that screening can prevent deaths from breast cancer.a so-called expert (=someone who says they are an expert, but who you do not respect very much)There are many so-called experts willing to tell you how to bring up your children. verbsexperts say somethingExperts are saying that the economy is likely to improve towards the end of this year.experts believe somethingLegal experts believe that the evidence will not be accepted in court.experts advise/recommend somethingMost financial experts recommend that you don’t borrow money on credit cards.talk to/consult an expert (=ask an expert for information or advice)If cracks appear in your house, you should consult an expert to find out what is causing the problem.get/obtain/seek advice from an expert (=ask an expert for information or advice)Don’t make big financial decisions without first seeking advice from an expert.phrasesa team/panel of expertsYou can get advice from our panel of gardening experts.THESAURUSexpert someone who has a lot of knowledge about something or skill at doing somethinga computer expertan expert on beetlesIt’s best to ask an expert.specialist an expert who has studied a particular medical or technical subject for a long time and knows much more about it than other peopleShe is a specialist in corporate finance.My doctor sent me to see a heart specialist.authority an expert whose knowledge and opinions are greatly respectedThe professor is one of the world’s leading authorities on African art.connoisseur /ˌkɒnəˈsɜː $ ˌkɑːnəˈsɜːr/ an expert on food, art, literature, or design, who has had a lot of experience and knows when something is of very good qualityHe was a connoisseur of fine wines.His works are popular among connoisseurs.buff /bʌf/ informal someone who is very interested in a subject and knows a lot about ita wine buffJazz buffs will be familiar with the band’s first album.virtuoso /ˌvɜːtʃuˈəʊsəʊ $ ˌvɜːrtʃuˈoʊsoʊ/ an expert player or performerThe piece was played by violin virtuoso Pavel Sporcl.a virtuoso pianist
Examples from the Corpus
expert• I am an expert among experts.• He'd had more than enough practice to become an expert.• These days everyone is becoming an expert in the nutritionalvalue of different foods and the importance of vitamins and traceelements.• The firm had to close while an expertsorted out the mess, the Old Bailey heard.• an expert in French history• A draft of the document was reviewed by experts on hospitalinfection control.• Legalexperts are saying that the man's conviction was unlawful.• The team of experts includes psychiatrists, psychologists and social workers.• What one expert sees as the organisational goals are different from the views of another expert.• D, a leading drugpreventionexpert who worked on the report.• Send the expert all the availableevidence.expert on• For the expert in the field, trivial names are short, convenient and an efficientmeans of communication.• For users not expert in statistics, a great deal of the output will be meaningless or open to misunderstanding.• He did well there, putting his marksmanship to better use by becoming expert in tigershooting.• It includes doctors Nick Walters, an exercise physiologist, and Tim Leigh, an expert in the clinical side of nutrition.• Their exuberantacceptance of your ideas indicated that you have become an expert in all aspects of their demanding business.• She is an expert on how a low-calorie diet and exercise can beatcellulite and other weight problems.• Howard is becoming something of an expert on the theory of social work, in fact.• He's an expert onancientEgyptian art.expertexpert2 ●●●W3AWL adjective1GOOD ATKNOW somethinghaving a special skill or special knowledge of a subject opp inexpertexpert on/in/atThe police are expert at handling situations like this in strict confidence.He cast his expert eye on the gardener’s work.► see thesaurus at skilful2relating to or coming from an expertMinisters depend on civil servants for expert advice. —expertly adverb —expertness noun [uncountable]COLLOCATIONS – Meaning 2: relating to or coming from an expertnounsexpert adviceGet some expert advice before investing in a property. expert opinion (=the opinions of people who know a lot about something)Expert opinion on the matter is deeply divided.expert evidence/testimonyTwo doctors were called to give expert testimony at the inquiry.expert knowledgeHe has expert knowledge of the plants and animals in this area.expert eye (=the eyes of someone who knows a lot about something)To the expert eye, this is a beautiful example of early Roman pottery.