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 spanning four degrees of the diatonic scale. In the Western twelve-semitone system, it consists of five standard semitones.

   The perfect fourth has a pitch ratio close to 4:3.

Synonyms

• P4

Related terms

• augmented fourth
• diminished fourth