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.
例句
I am not a religious fanatic but I am a Christian.我不是宗教狂热分子，但我是基督徒。
N-COUNT
(对某一活动、运动、生活方式)入迷者，痴狂者
If you say that someone is a fanatic, you mean that they are very enthusiastic about a particular activity, sport, or way of life.
例句
Both Rod and Phil are football fanatics.罗德和菲尔两人都是足球迷。