Definition of "expert" in English

adjective

1. Extraordinary capable or knowledgeable.

   • I am expert at making a simple situation complex.
   • My cousin is an expert pianist.

2. Characteristic of an expert.

   • This problem requires expert knowledge.

3. (obsolete) Proven, experienced, veteran.

noun

1. A person with extensive knowledge or ability in a given subject.

   • If an expert says it can't be done, get another expert. - David Ben-Gurion
   • We called in several experts on the subject, but they couldn't reach an agreement.

2. (chess) A player ranking just below master.

verb

1. (transitive) To have (something) reviewed or checked by an expert.

   • The bill in question was one proposing to appropriate from the public moneys of this State $30,000 to pay an accountant for experting the books of the Southern Pacific Company, in furtherance of litigation then pending.