<p><strong>Noun</strong></p><ul><li>quantity or amount: the least quantum of evidence.</li><li>a particular amount.</li><li>a share or portion.</li><li>a large quantity; bulk.</li><li>(Physics) the smallest quantity of radiant energy, equal to Planck's constant times the frequency of the associated radiation.</li><li>the fundamental unit of a quantized physical magnitude, as angular momentum.</li></ul><p><strong>Adjective</strong></p><ul><li>sudden and significant: a quantum increase in productivity.</li></ul><p><strong>End of Response</strong></p>