Zealous

Part of speech: adjective (a.)

1. Filled with, or characterized by, zeal; warmly engaged, or ardent, in behalf of an object. He may be zealous in the salvation of souls. Law.

2. Filled with religious zeal. [Obs.] Shak. -- Zeal"ous*ly, adv. -- Zeal"ous*ness, n.