1. in a fourfold manner; four times as much

Examples

• The company’s profits increased quadruply over the past decade.
• She was quadruply blessed with talent, beauty, intelligence, and kindness.
• The recipe calls for quadruply the amount of sugar used in the original version.
• His efforts were quadruply rewarded when he received four different scholarships.
• The population of the city grew quadruply between 1950 and 2000.