WordWeb Online

1. Of or relating to or caused by a toxin or poison
   "suffering from exposure to toxic substances"
    
2. Unpleasant and damaging or offensive
   "toxic language"; "a toxic relationship"
    
3. Harmful or very unpleasant and provocative
   "he condemned the toxic language"
    
4. (finance) very likely to yield a large loss

See also: cyanogenetic, cyanogenic, deadly, harmful, hepatotoxic, nephrotoxic, noxious, ototoxic, poisonous, toxicant, unhealthful, venomous, virulent

Antonym: nontoxic

Encyclopedia: Toxic