Quadruple \Quad"ru*ple\, a. [L. quadruplus, from quattuor four: cf. F. quadruple. See Quadrate, and cf. Double.]

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

Quadruple time (Mus.), that in which each measure is divided into four equal parts.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Quadruple \Quad"ru*ple\, n. [Cf. F. quadruple, L. quadruplum.]

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

Source: Webster's Revised Unabridged Dictionary (1913)
 

Quadruple \Quad"ru*ple\, v. t. [imp. & p. p. Quadrupled; p. pr. & vb. n. Quadrupling.]

[L. quadruplare: cf. F. quadrupler.]

To multiply by four; to increase fourfold; to double; to double twice. --A. Smith.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Quadruple \Quad"ru*ple\, v. i. To be multiplied by four; to increase fourfold; to become four times as much.

Source: Webster's Revised Unabridged Dictionary (1913)