<p><strong>Verb</strong></p><ul><li>(used with object) to regulate by or adjust to a certain measure or proportion; soften; tone down.</li><li>to alter or adapt (the voice) according to the circumstances, one's listener, etc.</li><li><strong>Synonyms</strong>: control, temper</li><li>Music: to attune to a certain pitch or key.</li><li>to vary the volume of (tone).</li><li>Telecommunications: to cause the amplitude, frequency, phase, or intensity of (a carrier wave) to vary in accordance with a sound wave or other signal, the frequency of the signal wave usually being very much lower than that of the carrier.</li></ul>