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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

Old wives’ tales of silver spoons turning black when they touch a poisonous mushroom, or that only bright-colored or foul-tasting mushrooms are unsafe are false, he said.

From Los Angeles Times • Dec. 10, 2025

The caption explained that she fell down stairs in her rush to escape when she heard that the poisonous smoke had reached Times Square.

From "Spooked!" by Gail Jarrow