/ Dictionary / Index E exponential function: Meaning and Definition of Find definitions for: ex'ponen'tial func'tion Pronunciation: [key] — Math. Math. the function y = e. any function of the form y = ba, where a and b are positive constants. any function in which a variable appears as an exponent and may also appear as a base, as y = x Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. exponential curve exponential horn Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language