<p><strong>Noun:</strong></p><ul><li>The knowledge and ability needed to control and navigate an aircraft.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>Modulated, modulating.</li><li>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>To attune to a certain pitch or key (Music).</li><li>To vary the volume of (tone).</li><li>To cause the amplitude, frequency, phase, or intensity of (a carrier wave) to vary in accordance with a sound wave or other signal.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>To talk; visit: Enjoyed modulating with you.</li><li>To pass from one key to another: to modulate abruptly from A to B flat (Music).</li></ul>