·adj Fourfold; as, to make quadruple restitution; a quadruple alliance.
II. Quadruple ·vi To be multiplied by four; to increase fourfold; to become four times as much.
III. Quadruple ·vt To multiply by four; to increase fourfold; to Double; to double twice.
IV. Quadruple ·noun four times the sum or number; a fourfold amount; as, to receive to quadruple of the amount in damages.