Definitions:

1. A sense of fervor that can border on obsessiveness or excessive fervor. ADVERB
   • The prosecutor zealously argued the case, determined to secure a conviction.
2. Conveys the idea of being highly dedicated or fervent in one's actions or pursuits. ADVERB
   • The volunteers worked zealously to complete the project ahead of schedule.
3. Describes doing something with great enthusiasm, passion, or eagerness. ADVERB
   • She zealously defended her beliefs during the debate, refusing to back down.

Synonyms:

• actively
• arduously
• diligently
• intensively
• intently
• resolutely
• vehemently