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