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Definitions

fanatical

[fuh-nat-i-kuhl] / fəˈnæt ɪ kəl /
ADJECTIVE
overenthusiastic
Synonyms
STRONGEST
bigoted dogmatic enthusiastic fervent frenzied impassioned narrow-minded obsessive passionate rabid single-minded stubborn violent zealous
WEAK
biased bugged burning contumacious credulous devoted domineering erratic extreme feverish fiery headstrong high on immoderate impulsive incorrigible infatuated mad monomaniacal nuts for obsessed obstinate opinionated partial partisan possessed prejudiced radical raving turned on unruly visionary wild willful
Antonyms
STRONGEST
apathetic broad-minded calm cool doubting happy indifferent lethargic tolerant unenthusiastic unexcited
WEAK
disinterested dispassionate impartial

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

India captain Suryakumar Yadav admitted Friday "there will be nerves" when India open their T20 World Cup campaign in front of more than 30,000 fanatical home supporters in Mumbai, but vowed to give them "entertainment".

From Barron's • Feb. 6, 2026

This is probably better suited to older kids, who won’t be disturbed by the themes, but will still appreciate the fanatical storytelling and stunning animation.

From Salon • Dec. 24, 2025

As ever, he’s fanatical about what makes a good one.

From The Wall Street Journal • Oct. 31, 2025

Enter DJ Admin, real name Rick Jansen, who is the man tasked with keeping the fanatical orange-clad crowd in the dedicated grandstands entertained during a race weekend.

From BBC • Aug. 29, 2025

His eyes are like that too, a piercing, slightly fanatical blue.

From "Cat's Eye" by Margaret Atwood

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.