<p><strong>Adjective</strong></p><ul><li>noting or pertaining to a method of changing the frequency of an incoming radio signal by adding it to a signal generated within the receiver to produce fluctuations or beats of a frequency equal to the difference between the two signals.</li></ul><p><strong>Verb</strong> (used without object)</p><ul><li>to produce a heterodyne effect.</li></ul><p><strong>Verb</strong> (used with object)</p><ul><li>to mix (a frequency) with a different frequency so as to achieve a heterodyne effect.</li></ul>