English Reference

Word

fanatical

Phoneticsfa·nat·i·cal

US/fəˈnætɪkəɫ/

UK/fɐnˈætɪkəl/

Definition

adj. having an extreme and sometimes dangerous level of interest or enthusiasm for something. You use this to describe someone who cares about a topic or hobby much more than a normal person would.

adj. characterised by excessive enthusiasm or uncritical devotion to a cause, hobby, or belief system. Often carries a negative connotation of irrationality or obsession.

Examples

“He is a fanatical supporter of the local football team.”

“Her fanatical attention to detail made her a great editor, but it also made her very difficult to work with.”

“The movement was driven by a fanatical commitment to its founding principles, often ignoring practical realities in favor of ideological purity.”

Examples

simple

“He is a fanatical supporter of the local football team.”

contextual

“Her fanatical attention to detail made her a great editor, but it also made her very difficult to work with.”

complex

“The movement was driven by a fanatical commitment to its founding principles, often ignoring practical realities in favor of ideological purity.”

Usage

Can be used both attributively before a noun and predicatively after a linking verb like 'be' or 'become'.

Real-World Examples

“He struck me then as fanatical, dangerously so.”
BBC News · 27 Aug 2026
“If he were British, he would be fanatical about free jazz, or some obscure Delta bluesman.”
The Guardian · 11 Aug 2026

Word family

fanaticNounfanaticalAdjective

This entry

Level
C1 · Advanced
Frequency
Occasional
Updated

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