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)
- 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
Related terms
- augmented fourth
- diminished fourth