adj ·Moderate ·High school level

Definitions

Adjective

1. 1
   Having an extreme, irrational zeal or enthusiasm for a specific cause.

   "fanatical devotion"

Adjective

1. 1
   marked by excessive enthusiasm for and intense devotion to a cause or idea wordnet

Synonyms

All synonyms

fanaticoverzealousagogardentat fever pitchauthoritarian

Example

More examples

"They are fanatical in their beliefs."

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.