1.NounThe amount of growth in a quantity per unit of time.
"A global population growth rate of a constant 100 million people per year means an aging population."
2.NounThe amount of growth in a quantity per unit of time, relative to the amount of the quantity during that time.
"The growth rate is defined as the change in the dependent variable, Y, for a time period divided by the Y value at the beginning of the period.; A constant growth rate produces exponential growth."