What does 4 m mean in horse racing?

In horse racing, "4 m" typically refers to the distance of a race being four meters. This measurement can be used in various contexts, such as in specific race formats or event setups. However, it's worth noting that most thoroughbred races are measured in furlongs or miles, so "4 m" might be more relevant in certain niche racing contexts or international formats. Always check the specific racing regulations for clarity.