definition of
quadruplicate

[1] #1 quadruplicate n. any four copies; any of four things that correspond to one another exactly; "it was signed in quadruplicate". wn

[2] #2 quadruplicate v. reproduce fourfold; "quadruplicate the bill". wn

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