ADJ-GRADED
（尤指对政治或宗教理想）热情的，充满激情的，狂热的
Someone who is zealous spends a lot of time or energy in supporting something that they believe in very strongly, especially a political or religious ideal.
例句
She was a zealous worker for charitable bodies...
她对慈善事业充满热忱。
He was a recent Catholic convert, and very zealous.
他最近才皈依天主教，是一名狂热的信徒。