Definition of fiend
- a golf fiend
- a dope fiend
- a fiend at mathematics
a fiend in human form
He's a real golf fiend.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'fiend.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use: before 12th centurySee Words from the same year
: an evil spirit : a demon or devil
: a very evil or cruel person
: a person who is very enthusiastic about something
What made you want to look up fiend? Please tell us where you read or heard it (including the quote, if possible).