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Definitions

deleterious

[del-i-teer-ee-uhs] / ˌdɛl ɪˈtɪər i əs /


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.

When they met in Munich last month, California Gov. Gavin Newsom sought his views on curbing the addictive and deleterious effects of social media on children.

From The Wall Street Journal • Mar. 27, 2026

"Those beneficial mutations in the old environment might become deleterious in the new environment."

From Science Daily • Dec. 24, 2025

But he demonstrated Wednesday that his leadership remains intact—and strong enough to prevent tension in the Fed’s dual mandate from devolving into deleterious tension within the committee.

From Barron's • Dec. 12, 2025

This week Dahlia spoke about the deleterious effects of these actions on voting rights with Maya Wiley, president and CEO of The Leadership Conference on Civil and Human Rights.

From Slate • Jul. 26, 2025

Terryl was doing a command performance for her debate team, arguing about the deleterious impact of violence in advertising.

From "A Deadly Wandering: A Mystery, a Landmark Investigation, and the Astonishing Science of Attention in the Digital Age" by Matt Richtel