adj. 1. Consisting of four parts or members. 2. Four times as much in size, strength, number, or amount. 3. Music Having four beats to the measure. n. A fourfold amount or number. tr. & intr.v. quad·ru·pled, quad·ru·pling, quad·ru·ples To multiply or be multiplied by four: quadrupled the order; quadrupled in size. [From Middle English quadriple, fourfold amount, and quadruple, tooth with four roots, both from Old French quadruple, from Latin quadruplum, from neuter of quadruplus, fourfold : quadru-, quadri-, quadri- + -plus, -fold; see pel-2 in the Appendix of Indo-European roots.] quad·ruply adv. |
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