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English definition of “fanatic”

fanatic

noun [C]     /fəˈnæt.ɪk/ US  /-ˈnæt̬-/
C2 a person whose strong admiration for something is considered to be extreme or unreasonable : a fitness / film fanaticEnthusiastsAdmirers
(Definition of fanatic noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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