Definition of fanatical in English:

fanatical

Line breaks: fan¦at|ic¦al
Pronunciation: /fəˈnatɪkəl
 
/

adjective

1Filled with excessive and single-minded zeal: fanatical revolutionaries
More example sentences
  • The village folk take the palm leaf books as the store house of precious occult knowledge and guard them with fanatical zeal.
  • But such measures offer no deterrent to a single fanatical suicide attacker.
  • The elimination of all relics of the Hashemites was undertaken with fanatical zeal.
Synonyms
zealous, extremist, extreme, militant, dogmatic, sectarian, bigoted, rabid, maniacal, radical, diehard, activist; prejudiced, chauvinistic, intolerant, narrow-minded, single-minded, partisan, blinkered, illiberal, inflexible, uncompromising
British informal swivel-eyed
1.1Obsessively concerned with something: her husband was fanatical about tidiness
More example sentences
  • Mr Able usually wore a hat and had long grey hair and was fanatical about music, especially The Beatles.
  • Those of you familiar with my column know I'm pretty fanatical about security.
  • They are rather fanatical about lengthening their own lives and fending off death indefinitely.
Synonyms
enthusiastic, eager, keen, fervent, ardent, fervid, passionate, devoted, dedicated; over-enthusiastic, obsessive, obsessed, infatuated, fixated, compulsive, immoderate, frenzied, frenetic
informal wild, gung-ho, nuts, potty, dotty, crazy, hooked
US informal wackadoo, wackadoodle

Derivatives

fanatically

adverb
More example sentences
  • He was a conscientious objector, like me, but the big difference between us was, he was ferociously anti-smoking whereas I have always been fanatically pro it.
  • He wasn't even moderately religious, let alone fanatically religious.
  • Fishing was another sport in which Liam was fanatically interested and he was a member of Borris and Kilkenny Anglers' Clubs.

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