1. Rapidly increasing or quickly becoming greater in size: There is an exponential number of killings in Afghanistan and Iraq.

Job losses around much of the world have grown at an exponential rate.

2. A mathematical indication of how many times a number should be multiplied by itself: Jack and Jill were learning how to increase numbers in an exponential method; such as, 10⁵ by repeatedly multiplying 10 by itself five times resulting in a series of five amounts as follows: 10 X 10=100 X 10= 1,000 X 10 = 10,000 X 10 = 100,000 X 10 = 1,000,000.