Toxic Definition

Of, affected by, or caused by a toxin, or poison.
Webster's New World
Capable of causing injury or death, especially by chemical means; poisonous.
Toxic industrial waste.
American Heritage
Acting as a poison; poisonous.
Webster's New World
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.
American Heritage
Causing social tension or unpleasantness.
A toxic personality.
American Heritage
A toxic substance; also, something contaminated by a toxic substance.
Webster's New World

Origin of Toxic

  • 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

  • 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

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