Definition of "Poison" :

noun: anything that harms or destroys

"The poison of fascism."

noun: any substance that causes injury or illness or death of a living organism

verb: administer poison to

"She poisoned her husband but he did not die."

verb: add poison to

"Her husband poisoned her drink in order to kill her."

verb: kill with poison

"She poisoned her husband."

verb: kill by its poison

"This mushrooms can poison."

verb: spoil as if by poison

"Poison someone's mind."