The term "100th" refers to the ordinal number that signifies the position of something in a sequence, specifically the one hundredth item. It is often used to mark significant milestones, such as anniversaries or achievements, in various contexts, including sports, education, and celebrations. For example, the 100th anniversary of an event is a notable occasion that commemorates a century since it occurred. Similarly, in sports, a player might celebrate their 100th game or 100th goal, highlighting their accomplishments and contributions to their team or sport.