a person motivated by irrational enthusiasm (as for a cause); "A fanatic is one who can't change his mind and won't change the subject"--Winston Churchill
If you say that someone is a fanatic, you mean that they are very enthusiastic about a particular activity, sport, or way of life. Both Rod and Phil are football fanatics. = enthusiast
Pertaining to, or indicating, fanaticism; extravagant in opinions; ultra; unreasonable; excessively enthusiastic, especially on religious subjects; as, fanatic zeal; fanatic notions
A person affected by excessive enthusiasm, particularly on religious subjects; one who indulges wild and extravagant notions of religion
marked by excessive enthusiasm for and intense devotion to a cause or idea; "rabid isolationist"
disapproval If you describe someone as a fanatic, you disapprove of them because you consider their behaviour or opinions to be very extreme, for example in the way they support particular religious or political ideas. I am not a religious fanatic but I am a Christian. = extremist
1. (Asab'dan) Bir şeye veya bir kimseye taraflı olma. 2. Din bakımından fazla salâbetli olma. 3. Kendi dinini çok üstün görmek. 4. Haksız yere husumet etmek. 5. Bir düşünüşe, bir inanışa koru körüne bağlanıp ondan başkasını düşünmemek hâli