toxic🔊

(toxicology, pharmacology) Having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities. +

(medicine) Appearing grossly unwell; characterised by serious, potentially life-threatening compromise in the respiratory, circulatory or other body systems.

(figurative) Severely negative or harmful.

(figurative, of a person) Hateful or strongly antipathetic.