1. in a very loud, powerful, or impressive manner
2. to an extreme degree; very
Usage: informal; emphatic

Examples

• The waterfall crashed thunderingly into the pool below.
• The crowd cheered thunderingly as the team scored.
• His voice boomed thunderingly across the auditorium.
• The storm moved thunderingly across the plains.
• She was thunderingly successful in her new business venture.
• The performance was thunderingly good.