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.

1. Of, relating to, or caused by a toxin or other poison: a toxic condition; toxic hepatitis. 2. Capable of causing injury or death, especially by chemical means; poisonous: toxic industrial waste.

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.

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, …

If you describe something such as a relationship, situation, or discussion as toxic, you mean that it is very bad or harmful. A recession and high unemployment is a politically toxic combination. My …

a toxic substance/compound The fumes from that chemical are highly toxic. Tests will be run to determine if the landfill is toxic.