n. | 1. | An implacable or malicious foe; one who is diabolically wicked or cruel; an infernal being; - applied specifically to the devil or a demon. |
Noun | 1. | ![]() |
2. | fiend - one of the evil spirits of traditional Jewish and Christian belief | |
3. | fiend - a person motivated by irrational enthusiasm (as for a cause); "A fanatic is one who can't change his mind and won't change the subject"--Winston Churchill Synonyms: fanatic |