Definition of exponential in English:
exponential
Line breaks: ex¦ponen¦tialPronunciation: /ˌɛkspəˈnɛnʃ(ə)l
/
adjective
 1(Of an increase) becoming more and more rapid: the social security budget was rising at an exponential rateMore example sentences
 As you'll soon learn, an exponential increase in strength and effectiveness is best met with restraint and caution, not bloodlust.
 Well, unfortunately the models produce linear warming with exponential increases in carbon dioxide.
 This led to an exponential increase in the number of troops based in the area.
 2 Mathematics Of or expressed by a mathematical exponent: an exponential curveMore example sentences
 Those of you familiar with the mathematics of an exponential curve will note, however, that it is one of diminishing returns.
 Just as the forward function resembles the exponential curve, the inverse function appears similar to the logarithm.
 Napier also found exponential expressions for trigonometric functions, and introduced the decimal notation for fractions.
Derivatives

exponentially
adverb
 More example sentences
 Hatred and violence is rewarded with more hatred and violence, and this cycle is repeated exponentially.
 Traffic, on both these roads, has increased exponentially in recent years.
 It has become obvious that the digital production of images is growing exponentially.
Origin
early 18th century: from French exponentiel, from Latin exponere 'put out' (see expound).