as in poisonous
containing or contaminated with a substance capable of injuring or killing a living thing
certain plants are toxic if eaten
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Antonyms & Near Antonyms
as in poison
a substance that by chemical action can kill or injure a living thing
tested for toxics in the water supply
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Antonyms & Near Antonyms
Example Sentences
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Recent Examples of toxic
Sean Emery, Oc Register, 29 May 2026
Knisley has worked with communities where coal ash was used to fill children’s ball fields and seen Tennessee Valley Authority waste piles of the toxic ash piled up behind a public playground, open to the wind.
—ArsTechnica, 29 May 2026
Nushrat Rahman, Freep.com, 27 Dec. 2025
East Bay parks officials say hikers should beware of an unusually large number of toxic — and potentially deadly — mushrooms sprouting across the region.
—Jakob Rodgers, Mercury News, 10 Dec. 2025
See All Example Sentences for toxic
Adjective
Officials first responded to the GKN Aerospace facility on May 21 after a storage tank containing methyl methacrylate — a toxic chemical used in acrylic-plastics manufacturing — began venting vapors.
—Sean Emery, Oc Register, 29 May 2026
Knisley has worked with communities where coal ash was used to fill children’s ball fields and seen Tennessee Valley Authority waste piles of the toxic ash piled up behind a public playground, open to the wind.
—ArsTechnica, 29 May 2026
Noun
The Michigan Legislature passed a law in 2008 meant to protect the public from harmful electronic waste toxics.
—Nushrat Rahman, Freep.com, 27 Dec. 2025
East Bay parks officials say hikers should beware of an unusually large number of toxic — and potentially deadly — mushrooms sprouting across the region.
—Jakob Rodgers, Mercury News, 10 Dec. 2025
See All Example Sentences for toxic
Recent Examples of Synonyms for toxic
Adjective
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According to local media reports, Xu spent hundreds of thousands of yuan (tens of thousands of dollars) to buy highly toxic substances online, including alpha-amanitin, a lethal compound found in some poisonous mushrooms.—
CBS News,
CBS News,
27 May 2026
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According to local media reports, Xu spent hundreds of thousands of yuan (tens of thousands of dollars) to buy highly toxic substances online, including alpha-amanitin, a lethal compound found in some poisonous mushrooms.—
ABC News,
ABC News,
26 May 2026
Noun
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Human encroachment on wildlife habitat — along with other threats such as car collisions, rat poison and disease — are threatening the population across the state.—
Clara Harter,
Los Angeles Times,
29 May 2026
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At least five toxins were detected in his body, including deadly poisons such as mercury and tetrodotoxin, according to reports from Chinese media.—
Sylvie Zhuang,
CNN Money,
28 May 2026
Noun
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But some researchers who were involved in the network say the cuts weakened relationships with experts abroad that had been fostered over years, undercutting research collaborations on dangerous diseases like Ebola.—
Theresa Gaffney,
STAT,
3 June 2026
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The company also flags baseline cardiac disease, abnormal ECG, arrhythmia, prior cervical vagotomy, abnormal cervical anatomy, brain tumor or aneurysm history, head trauma, syncope, seizures and nickel allergy as unevaluated risks.—
Samantha Agate,
Sacbee.com,
3 June 2026
Noun
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Foxgloves This beautiful flower has trumpet-like blossoms that contain cardiac glycoside toxins, which interfere with the heart’s electrolyte balance.—
Amy DeYoung,
USA Today,
28 May 2026
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At least five toxins were detected in his body, including deadly poisons such as mercury and tetrodotoxin, according to reports from Chinese media.—
Sylvie Zhuang,
CNN Money,
28 May 2026
Cite this Entry
“Toxic.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/toxic. Accessed 5 Jun. 2026.
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