modulation

Etymology

It is inherited from Middle English modulacioun,^[2][3] borrowed from Middle French modulation and directly borrowed from Latin modulātiō (“rhythmical measure, singing, melody”),^[4][3][5] a noun of action from modulor (“to regulate, measure off; to play”),^[3][6] from modulus (“small measure”), a diminutive of modus (“measure, manner”),^[3] from Proto-Indo-European *med- (“to take appropriate measures”).^[3] Etymonline calls the French word Old French,^[3] while the OED dates it in French to 1365.^[4] In classical Latin it meant the inflection of the voice and, in architecture, measuring by a standard unit; the senses "melody" and "singing" are post-classical.^[4] The OED compares Italian modulazione and Spanish modulación.^[4]

Earliest recorded meaning

Harmony; singing or making music; a melody: before 1398, in Trevisa's translation of Bartholomaeus Anglicus, glossing Latin modulationis.^[2][4]

Semantic evolution

The musical first sense, singing or a melody, died out in the 19th century.^[4] From 1531, in Elyot's Governour, the word took on the Latin idea of measure: regulating or varying something to keep due proportion, later also variation of line or colour in art.^[4][3] From 1543 it was the inflection of the voice in tone and pitch,^[4] and in 1696 it was first used for the passing from one key to another in music.^[4][3] Johnson (1755) defined it first as forming a thing to a certain proportion.^[7] In the 20th century the word entered physics and engineering: from 1919 it was the varying of a radio wave or other signal to carry information,^[4] as in amplitude modulation and frequency modulation.^[8] From 1939 it also meant, in biology, the reversible change of a cell in response to its environment.^[4]

Timeline

• before 1398 – singing, making music; a melody (obsolete by 1837).^[2][4]
• 1531 – regulating something to due measure and proportion.^[4][3]
• 1543 – inflection of the voice in tone and pitch.^[4]
• 1665 – in architecture, proportioning the parts of an order (obsolete by 1842).^[4]
• 1696 – in music, passing from one key to another.^[4][3]
• 1919 – the varying of a wave or signal to carry information.^[4]
• 1939 – in biology, reversible change in a cell.^[4]

Meanings

Noun

1. The act of modulating or the state of being modulated; regulating or adjusting something to keep it in proportion.^[8][6][4]
2. A change in the pitch, tone or loudness of the voice or of a musical sound.^[6][8][4]
3. (music) A change from one key to another within a piece.^[8][6][4]
4. (physics, electronics) The varying of the amplitude, frequency or phase of a carrier wave to transmit a signal.^[8][6][4]
5. (archaic) Singing or making music; a melody.^[6][9][4]

Word family

• demodulation
• intermodulation
• overmodulation
• amplitude modulation
• frequency modulation
• phase modulation
• pulse modulation

Related words

• modulate
• modulator
• mode
• module
• modulus

References

1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
2. ^ a b c Kurath, Hans; Kuhn, Sherman M.; Lewis, Robert E., eds. (1952–2001), Middle English Dictionary, Ann Arbor: University of Michigan Press; online edition ed. Frances McSparran et al. (2000–2018)
3. ^ a b c d e f g h i j Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
4. ^ a b c d e f g h i j k l m n o p q r s t u v w Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
5. ^ Klein, Ernest. A Comprehensive Etymological Dictionary of the English Language. 2 vols. Amsterdam: Elsevier, 1966–1967.
6. ^ a b c d e f Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
7. ^ Johnson, Samuel (1755), A Dictionary of the English Language, London; 4th ed. 1773; Johnson's Dictionary Online, ed. Beth Rapp Young et al.
8. ^ a b c d e Collins English Dictionary (2023), Glasgow: HarperCollins
9. ^ Shorter Oxford English Dictionary on Historical Principles (2002), 5th ed., ed. William R. Trumble and Angus Stevenson, Oxford: Oxford University Press