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
Mrigakshi Dixit, Interesting Engineering, 7 Jan. 2026
Climate change has made habitat-restoration efforts more challenging, as have pollution from pesticides and even toxic tire dust.
—Katherine J. Wu, The Atlantic, 7 Jan. 2026
Noelle Phillips, Denver Post, 30 Sep. 2025
In 2023, 20 steel mills and coke plants nationwide emitted nearly 2.4 million pounds of air toxics, 289,722 tons of criteria air pollutants and 43.3 million metric tons of greenhouse gases, according to the study.
—Maya Wilkins, Chicago Tribune, 1 Sep. 2025
See All Example Sentences for toxic
Adjective
The findings show that early humans possessed knowledge of the toxic substance and how to use it.
—Noun
Environmental advocates say the new regulation of air toxics, which was required under a 2022 bill called Public Protections From Toxic Air Contaminants, will make the state’s air cleaner and its people healthier.
—Recent Examples of Synonyms for toxic
Adjective
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Anyone who may have eaten a poisonous mushroom is urged to seek medical help immediately.—
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Traces of plant toxins The chemical residues of this poisonous plant were found on 60,000-year-old quartz arrowheads.—
Noun
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This discovery represents the oldest direct evidence of arrow poison used by ancient humans for hunting.—
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But scientists didn’t have direct evidence of poison on these older weapons.—
Noun
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Plant diseases and pests can be spread by reusing dirty flower pots.—
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In 2024, Patrick's widow Lisa Niemi Swayze teamed up with leading non profit Pancreatic Cancer Action Network to help raise awareness of the disease and increase funding for research.—
Noun
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Besides, Kavian dry-prints electrodes in a variety of chemistries, and allows for rapid innovation while reducing waste and avoiding toxins.—
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Preliminary tests showed that ByHeart baby formula contained the type of bacteria that produces the toxin linked to a botulism outbreak, California health officials said.—
Cite this Entry
“Toxic.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/toxic. Accessed 12 Jan. 2026.
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