<p><strong>Noun</strong></p><ul><li>Satan; the devil.</li><li>Any evil spirit; demon.</li><li>A diabolically cruel or wicked person.</li><li>Synonyms: devil, beast, brute, savage, monster.</li><li>A person or thing that causes mischief or annoyance: Those children are little fiends.</li><li>Informal. A person who is extremely addicted to some pernicious habit: an opium fiend.</li><li>Informal. A person who is excessively interested in some game, sport, etc.; fan; buff: a bridge fiend.</li><li>A person who is highly skilled or gifted in something: a fiend at languages.</li></ul><p><strong>Verb</strong></p><ul><li>Also feen.</li><li>Slang. To desire greatly: just another junkie fiending after his next hit; As soon as I finish a cigarette I'm fiending to light another.</li></ul><p><strong>End of Response</strong></p>