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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

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

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

From The Wall Street Journal • Sep. 22, 2025

However, expert witness Dr Chris Danbury, a consultant in intensive care at University Hospital of Southampton, said she should have been taken directly to resus.

From BBC • Jun. 5, 2025

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

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

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