柯林斯詞典turning circle 1. N the smallest circle in which a vehicle can turn 廻轉(zhuǎn)圓 返回 turning circle劍橋詞典the amount of space a vehicle needs in order to go round in a complete circle （車輛等掉頭用的）廻轉(zhuǎn)空間，轉(zhuǎn)曏圓 返回 turning circle