a. An evil spirit; a demon.
b. The Devil; Satan.
c. A diabolically evil or wicked person.
2. Informal One who is addicted to something: a dope fiend.
3. Informal One who is completely absorbed in or obsessed with a given job or pastime: a crossword-puzzle fiend.
4. Informal One who is particularly adept at something: a fiend with computers.
v. fiend·ed, fiend·ing, fiends
To crave (a drug, for example): fiended cocaine.
To have an intense desire for something: fiended for the band's new release.
[Middle English, from Old English fēond; see pē(i)- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2017 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.
American Heritage Dictionary Products
The American Heritage Dictionary, 5th Edition
The American Heritage Dictionary of Idioms
The American Heritage Roget's Thesaurus
Curious George's Dictionary
The American Heritage Children's Dictionary
The American Heritage Dictionary of Indo-European Roots
The American Heritage Student Grammar Dictionary
The American Heritage Desk Dictionary + Thesaurus
The American Heritage Science Dictionary
The American Heritage Dictionary of Business Terms
The American Heritage Student Dictionary
The American Heritage Essential Student Thesaurus