The term "9th" typically refers to the ordinal number that comes after the 8th and before the 10th. It is used to indicate position in a sequence, such as in rankings, dates, or lists. For example, in a race, the runner who finishes after the 8th place is said to finish in 9th place. In music, "9th" can also refer to a type of chord known as a ninth chord, which includes the root, third, fifth, and the ninth note of a scale. This chord adds richness and complexity to musical compositions, often used in genres like jazz and blues.