a path or road, usually circular and with a hard surface, on which runners, cars, bicycles, etc. race, or the area that includes this path and buildings around it（通常指圆形、地面较硬的）跑道，赛道；（包括建筑物等设施的）比赛场，赛马场，赛车场

mainly US UK usually racecourse a wide, usually circular, path with a grass surface, on which horses race, or the area that includes this path and buildings around it赛马跑道