quadruple Meaning, definition in Cambridge English Dictionary
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Meaning of "quadruple" - English Dictionary

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quadrupleverb [I or T]

uk   /kwɒdˈruː.pl̩/  us   /kwɑːˈdruː-/
to become four times as big, or to multiply a number or amount by four: The number of students at the college has quadrupled in the last ten years. We expect to quadruple our profits this year.

quadrupleadjective, predeterminer

uk   /ˈkwɒd.rʊp.l̩/  us   /kwɑːˈdruː.pl̩/
four times as big: a quadruple measure We have had quadruple the number of applicants we expected. involving four parts, people, places, etc.: a quadruple fracture of his thumb
(Definition of quadruple from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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