GNU Collaborative International Dictionary of English

Found 4 definitions

1.       
   Quadruple , a. [L. quadruplus, from quattuor four: cf. F. quadruple. See Quadrate, and cf. Double.] Fourfold; as, to make quadruple restitution; a quadruple alliance.
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   Quadruple time (Mus.), that in which each measure is divided into four equal parts.
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2.       
   Quadruple, 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.
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3.       
   Quadruple, 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.
   
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4.       
   Quadruple, v. i. To be multiplied by four; to increase fourfold; to become four times as much.
   1913 Webster