Toxic definition

tŏksĭk
Acting as a poison; poisonous.
adjective
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20
A toxic chemical or other substance.
noun
31
23
Capable of causing injury or death, especially by chemical means; poisonous.
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The definition of toxic is something poisonous, or something very harmful or bad.

A poison that will cause you to become very ill is an example of something that would be described as toxic.

A relationship that is very bad for your mental health is an example of something that would be described as toxic.

adjective
7
2
(toxicology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.
adjective
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3
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Extremely risky or harmful, as a debt for which the borrower is in default and the collateral has lost so much value that its sale cannot cover the amount of the loan.
adjective
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1
Causing social tension or unpleasantness.

A toxic personality.

adjective
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1
Relating to or caused by a toxin or other poison.

A toxic condition; toxic hepatitis.

adjective
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Capable of causing injury or death, especially by chemical means; poisonous.

Toxic industrial waste.

adjective
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A toxic substance; also, something contaminated by a toxic substance.
noun
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12
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A toxic chemical or other substance.
noun
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Relating to or caused by a toxin.
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Of, affected by, or caused by a toxin, or poison.
adjective
7
12
Of, relating to, or caused by a toxin or other poison.

A toxic condition; toxic hepatitis.

adjective
5
11
Capable of causing injury or death, especially by chemical means; poisonous.

Toxic industrial waste.

adjective
4
11
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Origin of toxic

  • Late Latin toxicus from Latin toxicum poison from Greek toxikon poison for arrows, poison from neuter of toxikos of a bow from toxon bow from Old Persian taxša- an arrow

    From American Heritage Dictionary of the English Language, 5th Edition

  • French toxique, from Late Latin toxicus (“poisoned"), from Latin toxicum (“poison"), from Ancient Greek τοξικόν (toxikon), φάρμακον (pharmakon, “poison for use on arrows"), from τοξικός (toxikos, “pertaining to arrows or archery"), from τόξον (toxon, “bow").

    From Wiktionary