Quadruple a. : Fourfold; as, to make quadruple restitution; a quadruple alliance.

Quadruple n. : four times the sum or number; a fourfold amount; as, to receive to quadruple of the amount in damages.

Quadruple v. t. : To multiply by four; to increase fourfold; to double; to double twice.

Quadruple v. i. : To be multiplied by four; to increase fourfold; to become four times as much.

Example:
How much would a Quadruple bypass surgery cost for someone without health insurance?

Taxonomy
quadruplet, elements, free encyclopedia, four elements, search, international treaties, free dictionary, contexts, top tier, trophies, one season, magnitude, note in music, secondary systems, fails, revolutions, Personal tools, Interaction.

Defination from the web:
quadruple or quadruplet is an n-tuple with n being 4. This means it depicts four elements, with the order of the elements carrying meaning. ... In football, The Quadruple is the act of winning four top tier trophies in one season. To quadruple a magnitude is to ...