1. The act or process of modulating. 2. The state of being modulated. 3. A passing from one key or tonality to another by means of a regular melodic or chord progression. 4. A change in stress, pitch, loudness, or tone of the voice; an inflection of the voice. 5. An instance of such a change or an inflection. 6. The harmonious use of language, as in poetry or prose. 7. The variation of a property of an electromagnetic wave or signal, such as its amplitude, frequency, or phase.
