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expert witness

American  

noun

  1. a person, as a physician, who provides testimony at a legal proceeding in the form of professional opinions.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

De Masi himself has become a frequent expert witness and advisory collaborator for the U.S. government on quantum policy, and IonQ has a track record of collaborating with federal agencies.

From Barron's • May 6, 2026

An expert witness said no studies or clinical data suggested any of the treatments described given to the patients could cure any type of cancer.

From BBC • Apr. 28, 2026

Wise is a paid consultant for Pfizer, Bayer, K36, OncoC4, AstraZeneca, and Janssen Pharmaceuticals, and is an expert witness for Exxon Mobil.

From Science Daily • Feb. 25, 2026

An expert witness for the bank testified the barrels will be “very, very, very difficult to sell,” Everett said.

From The Wall Street Journal • Oct. 6, 2025

Her testimony was exposed as unreliable by the State's own expert witness, Dr. Dennis McNally, an obstetrician/gynecologist who examined Mrs. Colbey two weeks after the stillbirth.

From "Just Mercy" by Bryan Stevenson

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