definition of
poison

[1] #1 poison n. [toxicant, poisonous substance] any substance that causes injury or illness or death of a living organism. wn

[2] #2 poison v. spoil as if by poison; "poison someone's mind"; "poison the atmosphere in the office". wn

[3] #3 poison n. anything that harms or destroys; "the poison of fascism". wn

[4] #4 poison v. kill with poison; "She poisoned her husband". wn

[5] #5 poison v. [envenom] add poison to; "Her husband poisoned her drink in order to kill her". wn