Word.ws English Dictionary

perfect fifth

perfect fifth noun: an interval equal to that of between the second and third harmonics of the harmonic series. In twelve-tone equal temperament, it spans seven semitones or five degrees of the diatonic scale.

Noun

perfect fifth (plural perfect fifths)

  1. An interval equal to that of between the second and third harmonics of the harmonic series. In twelve-tone equal temperament, it spans seven semitones or five degrees of the diatonic scale.
    • The perfect fifth has a pitch ratio close to 3:2.
    Synonyms:
    P5

Synonyms of perfect fifth

Forms of perfect fifth

pluralperfect fifths

Questions about perfect fifth

What does perfect fifth mean?
Perfect fifth means an interval equal to that of between the second and third harmonics of the harmonic series. In twelve-tone equal temperament, it spans seven semitones or five degrees of the diatonic scale.
What part of speech is perfect fifth?
Perfect fifth is a noun.
What is the plural of perfect fifth?
The plural of perfect fifth is perfect fifths.

Words near perfect fifth in the dictionary

  1. perfect crimes
  2. perfect cube
  3. perfect cubes
  4. perfect field
  5. perfect fields
  6. perfect fifth
  7. perfect fifths
  8. perfect fourth
  9. perfect fourths
  10. perfect game
  11. perfect games

Source and license

Adapted from Wiktionary: perfect fifth (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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