/ Dictionary / Index E exponential: Meaning and Definition of Find definitions for: ex•po•nen•tial Pronunciation: (ek"spō-nen'shul, -spu-), [key] — adj. of or pertaining to an exponent or exponents. of or pertaining to the constant e. (of an equation) having one or more unknown variables in one or more exponents. —n. the constant e raised to the power equal to a given expression, as e3x, which is the exponential of 3x. any positive constant raised to a power. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: exponential (Thesaurus) exponent exponential curve Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language