View synonyms for toxic


[ tok-sik ]


  1. of, pertaining to, affected with, or caused by a toxin none or poison:

    a toxic condition.

  2. acting as or having the effect of a poison; poisonous:

    a toxic drug.

  3. causing unpleasant feelings; harmful or malicious: toxic criticism.

    a toxic boyfriend who wanted complete control over her;

    toxic criticism.

  4. Finance.
    1. pertaining to or noting debt that will probably not be repaid:

      toxic mortgages.

    2. pertaining to or noting a financial instrument or other asset that has no value or an unknown value because there is no market for it:

      toxic mortgage-backed securities.


  1. a toxic chemical or other substance.


/ ˈtɒksɪk /


  1. of, relating to, or caused by a toxin or poison; poisonous
  2. harmful or deadly
  3. (of a financial asset) likely to cause significant loss to the holder
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


/ tŏksĭk /

  1. Relating to or caused by a toxin.
  2. Capable of causing injury or death, especially by chemical means; poisonous.

Discover More

Derived Forms

  • ˈtoxically, adverb
Discover More

Other Words From

  • tox·i·cal·ly adverb
  • hy·per·tox·ic adjective
  • non·tox·ic adjective
  • non·tox·i·cal·ly adverb
  • post·tox·ic adjective
  • un·tox·ic adjective
  • un·tox·i·cal·ly adverb
Discover More

Word History and Origins

Origin of toxic1

First recorded in 1655–65; from Late Latin toxicus “poisonous,” derivative of toxicum “poison,” from Greek toxikón (for toxikòn phármakon literally, “bow poison,” i.e., poison used on arrows), equivalent to tóx(on) “bow” + -ikon, neuter of -ikos adjective suffix; -ic none
Discover More

Word History and Origins

Origin of toxic1

C17: from medical Latin toxicus, from Latin toxicum poison, from Greek toxikon ( pharmakon ) (poison) used on arrows, from toxon arrow
Discover More

Example Sentences

The hydrovac trucks generate potentially toxic slurry waste.

I also think that media buying has a very aggressive, toxic culture tied to it.

From Digiday

They require lots of energy and produce large volumes of toxic gas too, creating more pollution and leaving a large carbon footprint.

A working sense of taste also helps protect us from eating something spoiled or toxic.

Other MOFs can filter toxic chemicals from the air and then store them or help break them down.

But it is not actually as toxic as it seems (although, admittedly, it does seem pretty toxic).

Infernal, it can cause fires and explosions; toxic, it can debilitate, poison, and kill.

But as her audience broadens, you have to wonder, is the big-time toxic to her art?

Republicans have a rare opportunity to implement policies that are truly compassionate and transcend toxic identity politics.

An autopsy found highly toxic cyanide levels in the blood of the not-so-dearly departed.

As he finds rag weed more toxic than the English timothy, his actual first dose is one-half of this theoretical dose.

His experiments show that amorphous phosphorus was not toxic to animals.

As before, I see it turn brown and die on the spot, still half inside the toxic corpse.

His constitution has never thrown off the malady resulting from this toxic (poisonous) agent.

The drowsy feeling which we experience in a crowded, ill-ventilated room is due entirely to the influence of these toxic gases.