Major-seventh definition

(music) A musical interval of the Western twelve-semitone system consisting of eleven semitones and spanning seven degrees of the diatonic scale. It is one semitone wider than a minor seventh and enharmonically equivalent to a diminished octave.

The major seventh has a pitch ratio close to 17:9.

noun
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Other Word Forms

Noun

Singular:
major-seventh
Plural:
major-sevenths