Definition of poisonous adjective from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈpɔɪzənəs//
    ; NAmE NAmE//ˈpɔɪzənəs//
    Waste and pollution
    jump to other results
  1. 1  causing death or illness if swallowed or absorbed into the body synonym toxic poisonous chemicals/plants This gas is highly poisonous. The leaves of certain trees are poisonous to cattle. See related entries: Waste and pollution
  2. 2  (of animals and insects) producing a poison that can cause death or illness if the animal or insect bites you synonym venomous poisonous snakes a tiny spider with a poisonous bite
  3. 3extremely unpleasant or unfriendly a poisonous person the poisonous atmosphere in the office
See the Oxford Advanced American Dictionary entry: poisonous