by a factor of four; the price of gasoline has increased fourfold over the past two years

[ Syn: four times , four times , four times , four times , four times , four times , four times , four times ]

four times as great or many; a fourfold increase in the dosage

[ Syn: quadruple , four-fold ]

having four units or components; quadruple rhythm has four beats per measure; quadruplex wire

[ Syn: quadruple , quadruplicate , quadruplex , four-fold ]