Thesaurus.com
Dictionary.com
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.

See Examples For:

This leads to dehydration and eventually “desertification”—a phenomenon the film tracks across a quasi-equatorial band of the Earth, where deforestation in pursuit of farmland has had a deleterious effect.

From The Wall Street Journal Jun. 2, 2026

Demand destruction is among the many deleterious consequences of oil near $100 a barrel, said Pavel Molchanov, investment strategy analyst at Raymond James.

From MarketWatch Apr. 14, 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

“The results are always more significant if the patient and I are alone when the psychosubstantiation tests are performed. External distractions have a deleterious effect on the ramified scores.”

From "Flowers for Algernon" by Daniel Keyes




Vocabulary lists containing deleterious


Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training