Definitions of zealous

1. Zealousness.

2. Zealously.

3. marked by active interest and enthusiasm; " an avid sports fan"; " a great walker"; " an eager beaver"

4. Filled with religious zeal.

5. Eager in the pursuit of an object; enthusiastic.

6. Full of zeal: warmly engaged or ardent in anything.

7. Filled with zeal; ardent.

8. Filled with or incited by zeal.