Definitions
1.nounA devil or demon; a malignant or diabolical being; an evil spirit.
2.nounA very evil person.
3.nounAn enemy; a foe."Religion teaches us to love everybody, be one fiend or friend."
4.nounThe enemy of mankind, specifically, the Devil; Satan.
5.nounAn addict or fanatic."He's been a jazz fiend since his teenage years."
6.verbTo yearn; to be desperate (for something).