perfect fourth

English

Etymology

The word perfect refers to the fact that so-called perfect intervals are neither major nor minor.

Noun

perfect fourth (plural perfect fourths)

  1. A musical interval of the Western twelve-semitone system consisting of five semitones and spanning four degrees of the diatonic scale. It is enharmonically equivalent to an augmented third.
    The perfect fourth has a pitch ratio close to 4:3.

Abbreviations
  • P4
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