fourfold

adj 1: four times as great or many; "a fourfold increase in the

dosage" [syn: {quadruple}]

2: having four units or components; "quadruple rhythm has four

beats per measure" [syn: {quadruple}, {quadruplicate}]

adv : by a factor of four; "the price of gasoline has increased

fourfold over the past two years" [syn: {four times}]