Ninth

Major ninth on C

Minor ninth on C

ninth chord

Augmented ninth on C

Dominant ninth chord on C 4 voice

Major ninth chord on C

Ninth may refer to several concepts across various fields such as music, mathematics, and history. This article aims to explore the significance of the term "ninth" in these different contexts, providing a comprehensive understanding of its applications and relevance.

Music

In the realm of music, the term "ninth" is primarily associated with chords and intervals. A ninth refers to the interval spanning nine notes on the diatonic scale, counting both the first and last notes. It is one whole step above an octave. In chord theory, a ninth chord includes the seventh and the ninth interval above the root note, adding richness and complexity to the sound.

Types of Ninth Chords

• Major ninth: A chord that includes the major seventh and major ninth above the root.
• Dominant ninth: A chord that consists of a dominant seventh and a major ninth.
• Minor ninth: A chord with a minor seventh and a major ninth. It is important to note that the term can also refer to the interval specifically, which is a minor second above an octave.

Ninth chords are widely used in various music genres, including jazz, classical music, and popular music, for their expressive quality and depth.

Mathematics

In mathematics, "ninth" can refer to the ordinal form of the number nine, indicating a position in a sequence. It can also relate to the concept of fractions, where a ninth is one part of nine equal parts of a whole.

History

The term "ninth" may also appear in historical contexts, such as the Ninth Amendment to the United States Constitution, which is part of the Bill of Rights. It addresses rights of the people that are not specifically enumerated in the Constitution.

Other Uses

"Ninth" can also refer to:

• The ninth inning in a game of baseball, which is typically the last inning in a standard game.
• The Ninth Doctor, a character in the Doctor Who series, representing the ninth incarnation of the titular character.

See Also

• Eighth
• Tenth

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