1. multiplied by four; four times as great or as many
2. consisting of four parts or elements

1. in four ways; to four times the degree or extent

Examples

• The company saw a fourfold increase in profits over the past year.
• The recipe calls for a fourfold amount of flour compared to sugar.
• The new policy has a fourfold purpose: to improve safety, efficiency, quality, and morale.
• Production costs rose fourfold after the factory expansion.
• The fourfold structure of the argument made it easy to follow.
• Revenue increased fourfold in just three years.