expert witness

American  

noun

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

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Example Sentences

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

And this could include situations where police cannot find an expert witness or may not be able to obtain a required medical statement.

From BBC • Jun. 6, 2025

“There is a tradition of firearms regulation in the United States,” said Brian DeLay, a University of California, Berkeley, historian who has also been an expert witness in post-Bruen cases.

From Slate • Jun. 4, 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