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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.

It’s got poisonous lead in it from paint.

From Salon • Mar. 6, 2026

The death cap is the world’s most poisonous mushroom, responsible for 90% of mushroom-related fatalities.

From Los Angeles Times • Jan. 16, 2026

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

From Science Daily • Jan. 16, 2026

He was responding to a question from Liberal Democrat leader Sir Ed Davey, who said antisemitism was real, "poisonous" and that "we must all work together to stamp it out".

From BBC • Dec. 17, 2025

Tess’s mother left the window and leaned back into the corner, as if three kids were poisonous and she was afraid to come too close.

From "As Brave As You" by Jason Reynolds




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