horse racing

This term refers to the organized sport of equine competition. It carries a strong association with gambling and the "turf," often evoking images of high-stakes betting and social prestige. While it describes the physical act of horses running, in a socio-economic context, it frequently implies the entire industry, including breeding, training, and wagering.

As a compound noun describing a specific sport or activity, it is treated as an uncountable mass noun. One does not refer to "a horse racing" or "multiple horse racings"; instead, individual events are called "races" and the overall activity is referred to as "horse racing."