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toxic

[ tok-sik ]
/ ˈtɒk sɪk /
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Definition of toxic

adjective
of, pertaining to, affected with, or caused by a toxin or poison: a toxic condition.
acting as or having the effect of a poison; poisonous: a toxic drug.
causing unpleasant feelings; harmful or malicious: a toxic boyfriend who wanted complete control over her; toxic criticism.
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.
noun
a toxic chemical or other substance.
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Origin of toxic

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; see -ic

OTHER WORDS FROM toxic

WORDS THAT MAY BE CONFUSED WITH toxic

toxic , toxin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use toxic in a sentence

British Dictionary definitions for toxic

toxic
/ (ˈtɒksɪk) /

adjective
of, relating to, or caused by a toxin or poison; poisonous
harmful or deadly
(of a financial asset) likely to cause significant loss to the holder

Derived forms of toxic

toxically, adverb

Word Origin for toxic

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

Scientific definitions for toxic

toxic
[ tŏksĭk ]

Relating to or caused by a toxin.
Capable of causing injury or death, especially by chemical means; poisonous.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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