English Reference

Word

fiend

Phoneticsfiend

US/ˈfind/

UK/fˈiːnd/

Countable noun

Definition

n. someone who is very interested in or obsessed with a specific activity. It can also mean a person who is very cruel or wicked.

n. an individual with an intense, obsessive interest in a specific activity or substance; alternatively, a person of great wickedness or cruelty. Often used in compound forms to describe enthusiasts.

Examples

“My brother is a total fitness fiend.”

“As a self-proclaimed coffee fiend, she refuses to start her morning without a double shot of espresso.”

“The antagonist was portrayed not as a mere criminal, but as a calculating fiend whose every action was designed to cause maximum psychological distress to his victims.”

Examples

simple

“My brother is a total fitness fiend.”

contextual

“As a self-proclaimed coffee fiend, she refuses to start her morning without a double shot of espresso.”

complex

“The antagonist was portrayed not as a mere criminal, but as a calculating fiend whose every action was designed to cause maximum psychological distress to his victims.”

Usage

Commonly used in informal compounds like 'caffeine fiend' or 'exercise fiend' to denote obsession.

Real-World Examples

“Hamilton worked out like a fiend for the role, and her resulting lean-yet-ripped physique made her an action heroine on par with Sigourney Weaver’s Ripley.”
Ars Technica 28 Aug 2026
“For years, crime-addled Canadians have called for more information on the fiends living among us.”
Toronto Sun 15 Aug 2026

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C2 ProficiencyIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.8.5–9.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 6.0114–120
Frequency
Occasional
Level
C2 · Proficiency
Updated

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English Reference