poison in WordNet English dictionary

1. add poison to
   "Her husband poisoned her drink in order to kill her"
   poison  envenom 
   
2. administer poison to
   "She poisoned her husband but he did not die"
   poison 
   
3. kill with poison
   "She poisoned her husband"
   poison 
   
4. kill by its poison
   "This mushrooms can poison"
   poison 
   
5. spoil as if by poison
   "poison someone's mind"; "poison the atmosphere in the office"
   poison 
   

1. anything that harms or destroys
   "the poison of fascism"
   poison 
   
2. any substance that causes injury or illness or death of a living organism
   poison  toxicant  poisonous substance