A devil or demon; a malignant or diabolical being; an evil spirit. / A very evil person. / (obsolete) An enemy; a foe. / (religious, archaic) The enemy of mankind, specifically, the Devil; Satan.

(slang, intransitive) To yearn; to be desperate (for something).

plural of fiend

Third-person singular simple present indicative form of fiend

Full of fiendish arts or spirit.

(informal) An intense craving (especially for a drug).

present participle of fiend

simple past tense and past participle of fiend

(derogatory, dated) A person who abuses drugs.

plural of dope fiend