- at a steady, rapid rate: The cost of a college education has increased exponentially over the last 30 years.
- at a continuous rate of growth or decay that can be calculated using the constant e, according to the rules of raising e to the power of a positive or negative exponent: Any population growing exponentially must, sooner or later, encounter shortages of resources.The measurable rate at which a radioactive nuclide’s atoms decay exponentially is the basis of radiometric dating.
