Definition of "Evil" :

noun: morally objectionable behavior

noun: the quality of being morally wrong in principle or practice

"Attempts to explain the origin of evil in the world."

noun: that which causes harm or destruction or misfortune

"The evil that men do lives after them; the good is oft interred with their bones."

adjective: having or exerting a malignant influence

adjective: morally bad or wrong

"Evil purposes."

adjective: having the nature of vice