quadruple

US /kwɑːˈdruː.pəl/
UK /kwɑːˈdruː.pəl/
1.

verviervoudigen

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.
1.

verviervoudigen

consisting of four parts, or four times greater in amount, number, or size:

:
My father had quadruple bypass heart surgery.
1.

verviervoudigen

a size, amount, price, etc. four times as big as something else:

:
This figure is roughly quadruple the amount authorized in 2002.