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Definitions

poisonous

[poi-zuh-nuhs] / ˈpɔɪ zə nəs /


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.

In this poisonous time, those who grin at the notion of playing a Traitor may think twice about the potential cost to their principles.

From Salon • Jan. 28, 2026

Whether you have sympathy for him, think his behaviour is appalling, or something in between, there's clearly a poisonous row raging over what he did.

From BBC • Jan. 17, 2026

Hydrogen cyanide, which is highly poisonous, can freeze into crystals at low temperatures.

From Science Daily • Jan. 16, 2026

Once “destined for great things,” Lila makes a poisonous marriage that she eventually escapes by leaving to work in a factory.

From The Wall Street Journal • Dec. 26, 2025

By the end of the war, scientists in Europe uncovered evidence that it was germs, not poisonous miasma, that attacked the body.

From "Ambushed!" by Gail Jarrow