racecourse
noun [ C ] mainly UK uk/ˈreɪs.kɔːs/ us/ˈreɪs.kɔːrs/ (US usually racetrack)
（通常指圆形、地面有草的）赛马跑道;（包括建筑物等设施的）赛马场
a wide, usually circular, path with a grass surface, on which horses race, or the area that includes this path and buildings around it
Synonym: track