expert

 
Pronunciation: /ˈɛkspəːt/

noun

  • a person who is very knowledgeable about or skilful in a particular area: an expert in health care a financial expert

adjective

  • having or involving a great deal of knowledge or skill in a particular area: he had received expert academic advice I have a friend who is very expert at the language

Derivatives

expertly

adverb

expertness

noun

Origin:

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