Dictionary.com
Thesaurus.com
Showing results for expert witness. Search instead for Expert tips.

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.

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

Johnson has been an advocate of Kory’s for years, calling the doctor as an expert witness in two 2020 Senate hearings.

From Salon • Dec. 15, 2025

Baccarelli has served as an expert witness in litigation against Tylenol’s maker.

From The Wall Street Journal • Sep. 22, 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

At times, too, she was needed as an expert witness for trials.

From "The Woman All Spies Fear" by Amy Butler Greenfield

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.