The meaning of TOXIC is containing or being poisonous material especially when capable of causing death or serious debilitation. How to use toxic in a sentence.

TOXIC definition: of, pertaining to, affected with, or caused by a toxin or poison. See examples of toxic used in a sentence.

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TOXIC definition: 1. poisonous: 2. very unpleasant or unacceptable: 3. causing you a lot of harm and unhappiness…. Learn more.

Definition of toxic adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

Toxicity is the degree to which a chemical substance or a particular mixture of substances can damage an organism. [1] Toxicity can refer to the effect on a whole organism, such as an animal, bacterium, …

1. of, pertaining to, affected with, or caused by a toxin or poison: a toxic condition. 2. acting as or having the effect of a poison; poisonous: a toxic drug.

Dec 14, 2025 · toxic (comparative more toxic, superlative most toxic) Tobacco smoke contains many toxic substances. If some types of electronic waste aren’t incinerated at a high enough temperature, …

There are seven meanings listed in OED's entry for the word toxic, one of which is labelled obsolete. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

WordReference Random House Unabridged Dictionary of American English © 2025 tox•ic (tok′ sik), adj. of, pertaining to, affected with, or caused by a toxin or poison: a toxic condition. acting as or having …