toxic

adjective
tox·​ic | \ ˈtäk-sik \

Definition of toxic

 (Entry 1 of 3)

1 : containing or being poisonous material especially when capable of causing death or serious debilitation toxic waste a toxic radioactive gas an insecticide highly toxic to birds
2 : exhibiting symptoms of infection or toxicosis the patient became toxic two days later
3 : extremely harsh, malicious, or harmful toxic sarcasm
4 : relating to or being an asset that has lost so much value that it cannot be sold on the market

toxic

noun

Definition of toxic (Entry 2 of 3)

: a toxic substance usually used in plural
variants: or toxico-

Definition of toxic- (Entry 3 of 3)

: poison toxicology

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Other Words from toxic

Adjective

toxicity \ täk-​ˈsi-​sə-​tē \ noun

Synonyms & Antonyms for toxic

Synonyms: Adjective

envenomed, poison, poisoned, poisonous, venomous

Synonyms: Noun

bane, poison, toxin, venom

Antonyms: Adjective

nonpoisonous, nontoxic, nonvenomous

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Examples of toxic in a Sentence

Adjective

The fumes from that chemical are highly toxic. Tests will be run to determine if the landfill is toxic.

Noun

tested for toxics in the water supply
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Recent Examples on the Web: Adjective

According to Vale’s website, the waste is composed mostly of sand and is non-toxic. Peter Prengaman, The Seattle Times, "Searchers probe deep mud from Brazil dam breach; 65 dead," 29 Jan. 2019 In her speech, the Queen called for civility and respect in what many interpreted as a reference to the increasingly toxic Brexit debate in England. Kayleigh Roberts, Marie Claire, "Queen Elizabeth Breaks Important Royal "Rule" by Talking About Brexit," 27 Jan. 2019 The liner is also non-toxic, odorless, and mildew and mold resistant. Maya Mcdowell, House Beautiful, "This Shower Curtain Liner Holds Your Device Up While You Shampoo," 24 Jan. 2019 About Environmentalism Everlane will eliminate virgin plastic from its business by 2021 and Stella McCartney has engineered a chic sneaker that doesn’t use any toxic glue. Steff Yotka, Vogue, "11 Reasons to Be Excited About The Year in Fashion," 4 Jan. 2019 Makers of vaping devices say their products are intended for use by adults, particularly smokers who would like to cut back on regular cigarettes by switching to a less-toxic alternative. Karen Kaplan, The Seattle Times, "Vaping among teens spikes, luring new generation of kids into tobacco use," 18 Dec. 2018 Like all Wallshoppe products, the Chris Benz x Wallshoppe collection is made from 30 percent recyclable material and printed in Los Angeles with non-toxic ink. Hannah Morrill, ELLE Decor, "Chris Benz's Wallshoppe Wallpaper Collection Is Everything," 26 Nov. 2018 All along the way, there’s places where toxic pollution is essentially poisoning communities. Patrick Sisson, Curbed, "Your online shopping is polluting this small town," 20 Nov. 2018 There have been hints that amyloids weren’t the toxic bad boys solely responsible for the destruction of vital brain circuits. Linda Marsa, Discover Magazine, "A New Treatment for Alzheimer's? It Starts With Lifestyle," 16 Nov. 2018

Recent Examples on the Web: Noun

The June failure to meet emission standards limiting air toxics represents a new challenge for Colstrip owners. Hal Bernton, The Seattle Times, "Puget Sound Energy looks elsewhere for power as pollution-test failure idles most of Montana coal plant," 27 July 2018 The Kennecott Minerals Company cleaned up toxics and donated the subsurface. Tom Kizzia, Anchorage Daily News, "Amid the ruins of the Kennecott mine, a quiet new look at a unique slice of history," 26 June 2018 In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics. Washington Post, "California moves to clear coffee of cancer-risk stigma," 17 June 2018 In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics. Brian Melley, BostonGlobe.com, "California moves to clear coffee of cancer-risk stigma," 16 June 2018 In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics. Brian Melley, BostonGlobe.com, "California moves to clear coffee of cancer-risk stigma," 16 June 2018 In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics. Washington Post, "California moves to clear coffee of cancer-risk stigma," 17 June 2018 In the past, the organization has said coffee has health benefits and that the lawsuit made a mockery of the state law intended to protect people from toxics. Brian Melley, BostonGlobe.com, "California moves to clear coffee of cancer-risk stigma," 16 June 2018 Grassroots mobilizations and other forms of pressure helped nudge America’s political leadership to halt pipelines and craft new policies on climate change, fracking, and toxics. Christopher Sellers, Vox, "How Republicans came to embrace anti-environmentalism," 6 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'toxic.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of toxic

Adjective

1664, in the meaning defined at sense 1

Noun

1890, in the meaning defined above

History and Etymology for toxic

Adjective

Late Latin toxicus, from Latin toxicum poison, from Greek toxikon arrow poison, from neuter of toxikos of a bow, from toxon bow, arrow

Combining form

New Latin, from Latin toxicum

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Dictionary Entries near toxic

Toxcatl

toxemia

toxemic jaundice

toxic

toxic-

toxical

toxicant

Statistics for toxic

Last Updated

12 Feb 2019

Look-up Popularity

Time Traveler for toxic

The first known use of toxic was in 1664

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More Definitions for toxic

toxic

adjective

English Language Learners Definition of toxic

: containing poisonous substances

toxic

adjective
tox·​ic | \ ˈtäk-sik \

Kids Definition of toxic

: containing, being, or caused by poisonous or dangerous material toxic waste toxic effects

toxic

adjective
tox·​ic | \ ˈtäk-sik \

Medical Definition of toxic

 (Entry 1 of 2)

1 : containing or being poisonous material especially when capable of causing serious injury or death toxic drugs toxic gas
2 : of, relating to, or caused by a poison or toxin toxic liver damage
3a : affected by a poison or toxin
b : affected with toxemia of pregnancy toxic pregnant women

toxic

noun

Medical Definition of toxic (Entry 2 of 2)

: a toxic substance

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toxic

adjective
tox·​ic | \ ˈtäk-sik \

Legal Definition of toxic

1 : containing or being poisonous material especially when capable of causing death or serious debilitation
2 : having substantially lowered worth specifically : relating to or being an asset that has lost so much value that it cannot be sold on the market toxic assets toxic subprime loans

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More from Merriam-Webster on toxic

Thesaurus: All synonyms and antonyms for toxic

Spanish Central: Translation of toxic

Nglish: Translation of toxic for Spanish Speakers

Britannica English: Translation of toxic for Arabic Speakers

Comments on toxic

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