Q

adj. Fourfold; as, to make quadruple restitution; a quadruple alliance. Quadruple time (Mus.), that in which each measure is divided into four equal parts.

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

 - vb. To multiply by four; to increase fourfold; to double; to double twice. To be multiplied by four; to increase fourfold; to become four times as much.