ninth

The ordinal number matching the number nine in a series.

One of nine equal parts.

A harmonic or melodic interval of an octave and a second.

The tone at the upper limit of such an interval.

A chord consisting of a root with its third, seventh, and ninth.

Next in order or rank after the eighth, or before the tenth: an ordinal numeral: as, the ninth row; the ninth regiment.

Being one of nine: as, a ninth part.

A ninth part; the quotient of unity divided by nine.

In music, the interval, whether melodic or harmonic, between any tone and a tone one octave and one degree distant from it; also, a tone distant by such an interval from a given tone; a compound second.