major seventh

noun

A musical interval in Western music that approximates a frequency ratio of 15/8. It is one semitone wider than a minor seventh. In twelve-tone equal temperament, it consists of eleven semitones, spans seven degrees of the diatonic scale, and is enharmonically equivalent to a diminished octave.

Similar
M7maj7
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Meanings

nounmajor seventh (plural major sevenths)

plural major sevenths

  1. entertainmentA musical interval in Western music that approximates a frequency ratio of 15/8. It is one semitone wider than a minor seventh. In twelve-tone equal temperament, it consists of eleven semitones, spans seven degrees of the diatonic scale, and is enharmonically equivalent to a diminished octave.

    Synonyms: M7, maj7

Synonyms & antonyms

nounA musical interval in Western music that approximates a frequency ratio of 15/8. It is one semitone wider than a minor seventh. In twelve-tone equal temperament, it consists of eleven semitones, spans seven degrees of the diatonic scale, and is enharmonically equivalent to a diminished octave.

Similar
M7maj7
Cite this entry
APA

major seventh. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/major%20seventh

MLA

“major seventh.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/major%20seventh. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “major seventh,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/major%20seventh.

Source: major seventh on Wiktionary, CC BY-SA 4.0.