1. The act or process of modulating.
2. The state of being modulated.
a. A passing or transition from one key or tonality to another.
b. The result of such a transition.
a. A change in stress, pitch, loudness, or tone of the voice; an inflection of the voice.
b. An instance of such a change or an inflection.
5. The harmonious use of language, as in poetry or prose.
6. Physics The variation of a property of a wave, beam, or signal, such as its amplitude, frequency, speed, or phase.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.