Definitions
01a knowledgeable person
A2 · Elementary Countable noun
n. someone who has a lot of knowledge or skill in a particular area.
n. a person who has extensive skill or knowledge in a particular field.
日本語:専門家※
“If you have trouble with your computer, ask an expert to fix it.”
“The government consulted a leading expert in infectious diseases before finalizing the new public health policy.”
Usage
Commonly followed by the prepositions 'in', 'on', or 'at'.
Pitfall
He is an expert of history.
He is an expert in history.
Use 'in', 'on', or 'at' after expert, but rarely 'of'.
Teaching tip
While 'specialist' often implies a job title, 'expert' focuses more on the depth of knowledge.
Synonyms
02highly skilled
B1 · Intermediate
adj. having or showing a lot of knowledge or skill.
adj. possessing or demonstrating great skill or specialized knowledge.
“The chef gave us some expert advice on how to cook the perfect steak.”
“The witness provided expert testimony regarding the structural integrity of the bridge at the time of the collapse.”
Usage
Can be used before a noun or after a linking verb.
Synonyms
03skill ranking
C1 · Advanced Countable noun Sports Technical
n. a high level or rank in a game or sport, just below the top level.
n. a specific rank or classification for a player, typically positioned immediately below the 'master' level.
“He has played chess for years and finally reached the rank of expert.”
“In many competitive gaming circuits, achieving expert status is the final hurdle before entering the professional master class.”
Teaching tip
This is a specialized use in competitive contexts like chess or martial arts.
Collocations
Common phrases and expressions where native English speakers use the word “expert” in context.
Etymology
Inherited from Middle English [Term?], derived from Old French [Term?] (“experienced”), derived from Latin expertus, perfect active participle of experior (“to try”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADVERB
Related words
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.A2 KeyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.3.0–4.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 2.0–2.524–43TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.225–549
- Frequency
- Common
- Level
- A2 · ElementaryOxford
- Updated
- アルファベット
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QR code
englishreference.com/q/expert
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「日本語」「カタカナ語」 data: JMdict (EDRDG), CC BY-SA 4.0