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 (kwŏ-dro͞o′pəl, -drŭp′əl, kwŏd′ro͝o-pəl)
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.
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- in Indo-European roots.]

quad·ru′ply adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quadrupling - increase by a factor of four
multiplication - a multiplicative increase; "repeated copying leads to a multiplication of errors"; "this multiplication of cells is a natural correlate of growth"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.