The term "eighth" refers to the ordinal number that indicates the position of something in a sequence, specifically the one that comes after the seventh and before the ninth. It is commonly used in various contexts, such as ranking, measurements, and time. For example, in music, an eighth note is a note that lasts for half the duration of a quarter note. In fractions, "eighth" represents one part of eight equal divisions of a whole. For instance, if a pizza is cut into eight equal slices, each slice is one-eighth of the pizza. This concept is also used in measurements, such as an eighth of an inch, which is a common unit in carpentry and construction.