<p><strong>Adjective</strong></p><ul><li>Of or relating to an exponent or exponents.</li><li>Mathematics.</li><li>Of or relating to the constant e.</li><li>(Of an equation) Having one or more unknown variables in one or more exponents.</li><li>Rising or expanding at a steady, rapid rate: a city experiencing exponential growth.</li></ul><p><strong>Noun</strong></p><ul><li>Mathematics. The constant e raised to the power equal to a given expression, as e³^x, which is the exponential of 3^x.</li><li>Any positive constant raised to a power.</li></ul>