Tra từ expert - Từ điển Oxford Advanced Learner 8th

ex·pert AW [expert experts] noun, adjective BrE [ˈekspɜːt] NAmE [ˈekspɜːrt]
noun
a person with special knowledge, skill or training in sth
•a computer/medical expert
•~ (at/in/on sth) an expert in child psychology
•an expert on modern literature
•~ (at/in/on doing sth) He's an expert at getting his own way.
• Don't ask me— I'm no expert!

Word Origin:
Middle English (as an adjective): from French, from Latin expertus, past participle of experiri ‘try’. The noun use dates from the early 19th cent. Compare with ↑experience and ↑experiment.

Thesaurus:
expert noun C
•She's a leading expert in child psychology.
authority • • specialist • • connoisseur • • pundit • • buff • • afficionado • |informal, especially journalism guru •
a/an expert/authority/specialist in/on sth
a/an expert/authority/specialist in the field (of sth)
a leading expert/authority/specialist /pundit
Expert or authority? An expert is sb who is very skilled at sth and can give useful advice or training. An authority is sb who knows a lot about an academic subject, which may be very interesting but may not be useful or relevant.

Example Bank:
•A panel of experts will answer questions from the television audience.
•Experts agree that a balanced diet is the key to great health.
•She is a world expert on butterflies.
•an expert in skin care
•an expert on European art
•I'm no expert, but I think you should get that cut seen to.
•Medical experts are predicting a massive rise in obesity-related illnesses.
•Professor Browne is a world-renowned expert on volcanic activity.
•She's a leading expert in child psychology.
•The so-called experts seem to have no explanation for this.
•Weapons experts were sent to try to uncover evidence of a nuclear programme.
Derived Word: ↑expertly

adjective
done with, having or involving great knowledge or skill
•to seek expert advice/an expert opinion
•an expert driver
• We need some expert help.
•~ (at/in sth) They are all expert in this field.
•~ (at/in doing sth) She's expert at making cheap but stylish clothes.
compare ↑inexpert

Word Origin:
Middle English (as an adjective): from French, from Latin expertus, past participle of experiri ‘try’. The noun use dates from the early 19th cent. Compare with ↑experience and ↑experiment.

Thesaurus:
expert adj.
•They're all expert in this field.
great • • skilled • • talented • • gifted • • professional • • impressive • • masterly • • virtuoso • • accomplished • |BrE skilful • |AmE skillful •
Opp: inexpert
expert/great/skilled/accomplished/skilful at sth
expert/skilled/professional in sth
a/an expert/great/skilled/talented/professional/impressive/masterly/virtuoso/accomplished/skilful performance

Example Bank:
•It's a good idea to seek expert advice.
•Only a fully qualified doctor can give an expert opinion.
•She has expert knowledge of child psychology.
•She's expert at making cheap but stylish clothes.
•They're all expert in this field.