definition of
quadruple

[1] #1 quadruple v. increase fourfold; "His stock earning quadrupled". wn

[2] #2 quadruple n. [quartet, quartette, quadruplet] a set of four similar things considered as a unit. wn

[3] #3 quadruple s. [quadruplicate, quadruplex, fourfold, four-fold] having four units or components; "quadruple rhythm has four beats per measure"; "quadruplex wire". wn

[4] #4 quadruple n. a quantity that is four times as great as another. wn

[5] #5 quadruple s. [fourfold, four-fold] four times as great or many; "a fourfold increase in the dosage". wn