The term "90th" typically refers to the ordinal number that indicates the position of something in a sequence, specifically the one that comes after the 89th and before the 91st. It is often used in various contexts, such as ranking, anniversaries, or milestones. For example, a person celebrating their 90th birthday is marking nine decades of life. In events or competitions, "90th" can denote the rank achieved by an individual or team. For instance, in a race, finishing in the 90th place means that there are 89 participants who completed the race before that individual.