expert

1 of 3

noun

ex·​pert ˈek-ˌspərt 

: one with the special skill or knowledge representing mastery of a particular subject

expert

2 of 3

adjective

ex·​pert ˈek-ˌspərt  ik-ˈspərt 

1

: having, involving, or displaying special skill or knowledge derived from training or experience

2

obsolete : experienced

expertly adverb

expertness noun

expert

3 of 3

verb

ex·​pert ˈek-ˌspərt 

experted; experting; experts

intransitive verb

: to serve as an expert

Synonyms of expert

Noun

• master
• guru
• virtuoso
• wizard
• scholar
• specialist
• artist
• authority
• whiz
• maestro

Adjective

• virtuoso
• skillful

Choose the Right Synonym for expert

proficient, adept, skilled, skillful, expert mean having great knowledge and experience in a trade or profession.

proficient implies a thorough competence derived from training and practice.

proficient in translating foreign languages

adept implies special aptitude as well as proficiency.

adept at doing long division

skilled stresses mastery of technique.

a skilled surgeon

skillful implies individual dexterity in execution or performance.

skillful drivers

expert implies extraordinary proficiency and often connotes knowledge as well as technical skill.

expert in the evaluation of wines

Examples of expert in a Sentence

Noun

She was an acknowledged expert on child development.

an expert at planning dinner parties

Adjective

We received some expert advice.

The company has become expert at adapting its products for new clients.

Recent Examples on the Web

Noun

While hospitals continue investing in advanced diagnostic tools and antimicrobial materials, infection-prevention experts say the fundamentals still matter most. —Karina Nicholas, Boston Herald, 28 Nov. 2025

The alien experts at UNIT (Unified Intelligence Taskforce) subsequently play a pivotal role in negotiations, as a lowly agent named Barclay (Russell Tovey) reluctantly enters talks with Sea Devil counterpart Salt (Gugu Mbatha-Raw). —Richard Edwards, Space.com, 27 Nov. 2025

Adjective

This smart telescope is part of Unistellar's expert range of smart telescopes, suited to those with a good grip on astronomy, as collimation and manual focusing are needed when using this model. —Harry Bennett, Space.com, 26 Nov. 2025

For full daily and monthly horoscopes as well as expert readings, see our full Horoscopes experience. —Usa Today, USA Today, 25 Nov. 2025

Verb

Ice Climb Grand Island’s Trout Bay Michigan’s ice climbing capital offers more than 100 routes, from beginner WI2 pillars to expert WI6 curtains. —Outside, 4 Nov. 2025

He’s succeeded by evolving, in public, from newbie cinephile to expert—a journey he’s tracked by cataloging more than 2,000 movies on Letterboxd. —Spencer Kornhaber, The Atlantic, 17 Oct. 2025

Word History

Etymology

Noun

borrowed from French, going back to Middle French, derivative of expert expert entry 2

Adjective

Middle English, borrowed from Anglo-French, borrowed from Latin expertus "tested, shown to be true," from past participle of experīrī "to put to the test, attempt, have experience of, undergo" — more at experience entry 1

Verb

derivative of expert entry 1

First Known Use

Noun

1535, in the meaning defined above

Adjective

14th century, in the meaning defined at sense 2

Verb

circa 1889, in the meaning defined above

Phrases Containing expert

• efficiency expert
• expert opinions
• expert system
• expert witness

Rhymes for expert

• inexpert

Kids Definition

expert

1 of 2 adjective

ex·​pert ˈek-ˌspərt  ik-ˈspərt 

: showing special skill or knowledge gained from training or experience

expert advice

expertly adverb

expertness noun

expert

2 of 2 noun

ex·​pert ˈek-ˌspərt 

: a person with special skill in or knowledge of a subject

Legal Definition

expert

noun

ex·​pert

: a person with special or superior skill or knowledge in a particular area see also expert witness at witness