/ˈju: tɜ:n ||; ˈju ˌtɝn/noun[C] 1 a type of movement where a car, etc turns round so that it goes back in the direction it came from （汽车等）180度转弯，掉头，回转
2 (informal 非正式) a sudden change from one plan or policy to a completely different or opposite one （计划或政策的）突然彻底改变 ☞Look at about-turn. 参看about turn。