expert
She is an expert in artificial intelligence.
She has advanced knowledge and skills in AI.
A person with comprehensive or authoritative knowledge in a particular area.
The expert explained the complex theory in simple terms.
The specialist broke down the difficult concept clearly.
He is considered an expert in Renaissance art.
His deep knowledge of Renaissance art makes him highly respected.
Often used to describe someone with formal training or extensive experience.
Having or involving great knowledge or skill in a particular area.
She gave expert advice on the project.
Her suggestions were based on deep expertise.
Used before nouns to describe high-quality performance.
Collocations
Pro Tip
Avoid overusing 'expert'
Instead of saying 'She is an expert in marketing', specify the skill level: 'She is a marketing specialist' or 'She has advanced marketing skills'.
Gold Rule
Distinguish expertise from experience
An expert has both deep knowledge AND practical experience. Don't confuse with someone who merely has years of experience without skill development.
Word Origin
From Latin 'expertus', past participle of 'experiri' meaning 'to try, test, experience', combining 'ex-' (thoroughly) + 'peritus' (skilled). Entered English in the 14th century with the sense of 'having experience'.
Usage Notes
Used for both formal qualifications and informal mastery. In professional contexts, often implies certification or recognized standing.