From Longman Dictionary of Contemporary Englishquadruplequad‧ru‧ple1 /ˈkwɒdrʊpəl, kwɒˈdruː- $ kwɑːˈdruː-/ verb [intransitive, transitive] BINCREASE IN NUMBER OR AMOUNTto increase and become four times as big or as high, or to make something increase in this way → double, triple Food prices quadrupled during the war. The company has quadrupled its profits in just three years.→ See Verb table
Examples from the Corpus
quadruple• In ten years, homicide rates tripled and suicide rates quadrupled.• From humble beginnings sales have quadrupled and are set for further high growth in the next three years.• For families with children under age 5, the poverty rate quadrupled during the 1980s.• After three weeks, the youngster has tripled or even quadrupled its weight.• This is why its share price has nearly quadrupled since it went public in March 1989.• For example, transfers almost quadrupled the incomes of the poorest fifth of the income receivers.• Between 1949 and 1950, he quadrupled the number of regular Vietminh battalions to one hundred and seventeen.• By quadrupling the number of visitors, our foreign exchange would be enhanced by nearly £20,000 million.• Cleverly used it will double, treble, even quadruple the size.• By the end of 1973, the price of oil had quadrupled to $11.65 a gallon.quadruplequadruple2 adjective, predeterminer 1 BINCREASE IN NUMBER OR AMOUNTfour times as big or as many → double, triple The subjects were given quadruple the normal dosage of the drug.2 DHMNinvolving four things of the same kind a quadruple murderFrom Longman Business Dictionaryquadruplequad‧ru‧ple /ˈkwɒdrʊpəl, kwɒˈdruː-kwɑːˈdruː-/ verb [intransitive, transitive] to increase or make something increase by four timesPre-tax profits have more than quadrupled from £5 million to over £20 million.OPEC quadrupled the price of oil.We hope to quadruple production in two years.→ See Verb table 