| 1. | Satan; the devil. |
| 2. | any evil spirit; demon. |
| 3. | a diabolically cruel or wicked person. |
| 4. | a person or thing that causes mischief or annoyance: Those children are little fiends. |
| 5. | Informal. a person who is extremely addicted to some pernicious habit: an opium fiend. |
| 6. | Informal. a person who is excessively interested in some game, sport, etc.; fan; buff: a bridge fiend. |
| 7. | a person who is highly skilled or gifted in something: a fiend at languages. |
