Thesaurus.com
Dictionary.com
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

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

Perhaps, but it also gave an immediacy bordering on desperation to a story of teenage identity, poisonous social media and murder.

From The Wall Street Journal • Nov. 24, 2025

No one noticed the poisonous coral snake—until a camarada’s bare foot almost stepped on it.

From "Death on the River of Doubt" by Samantha Seiple