toxic

1. (toxicology, pharmacology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.Examples: "Tobacco smoke contains many toxic substances."; "If some types of electronic waste aren’t incinerated at a high enough temperature, dioxins, which can cause cancer and developmental problems, infiltrate the food supply. Without proper safeguarding, toxic heavy metals seep into the soil and groundwater."Synonyms: poisonous, venomous

2. (medicine) Appearing grossly unwell; characterised by serious, potentially life-threatening compromise in the respiratory, circulatory or other body systems.Examples: "The child appeared toxic on arrival at the hospital."

3. (figurative) Severely negative or harmful.Examples: "a toxic environment that promoted bullying"figuratively

4. (figurative, of a person) Hateful or strongly antipathetic.Examples: "It is not good to be around toxic people."; "Though Twitter is still overrun with toxic anger and fear-based nonsense (now more than ever), it is also, in one crucial way, beginning to play an important role in our response to the pandemic."; "A veteran UN diplomat, Kaag, 62, said the environment for politicians in the Netherlands had become “toxic” as she and colleagues faced a continual barrage of “hate, intimidation and threats” and often needed tight police security."figuratively