Quadruple

a.	1.	Fourfold; as, to make quadruple restitution; a quadruple alliance. Quadruple time (Mus.) that in which each measure is divided into four equal parts.
n.	1.	four times the sum or number; a fourfold amount; as, to receive to quadruple of the amount in damages.
v. t.	1.	To multiply by four; to increase fourfold; to double; to double twice. [imp. & p. p. Quadrupled ; p. pr. & vb. n. Quadrupling .]
v. i.	1.	To be multiplied by four; to increase fourfold; to become four times as much.

Noun	1.	quadruple - a quantity that is four times as great as another
Verb	1.	quadruple - increase fourfold; "His stock earning quadrupled"
Adj.	1.	quadruple - having four units or components; "quadruple rhythm has four beats per measure"; "quadruplex wire" Synonyms: quadruplex, quadruplicate, fourfold
	2.	quadruple - four times as great or many; "a fourfold increase in the dosage" Synonyms: fourfold

fourfold, multiple, quadruplex, quadruplicate