(quadruples, quadrupling, quadrupled)
1.
If someone quadruples an amount or if it quadruples, it becomes four times bigger.
Norway has quadrupled its exports to the EU...
The price has quadrupled in the last few years.
VERB: V n, V
2.
If one amount is quadruple another amount, it is four times bigger.
They could sell their merchandise for quadruple the asking price.
PREDET: PREDET det n
3.
You use quadruple to indicate that something has four parts or happens four times.
...a quadruple murder.
ADJ: ADJ n