turn·a·round 
(tûrnə-round′)
(tûrnə-round′)n.
1. A space, as in a driveway, permitting the turning around of a vehicle.
2. The act or an instance of turning about and facing or moving in the opposite direction.
3.
a. A dramatic change in fortune or performance, especially for the better: Stock prices fell in the morning but rallied in an afternoon turnaround.
b. A dramatic change in opinion, behavior, or allegiance: "Sometimes he would do a turnaround and say that maybe she was right" (Alice Munro).
4.
a. The process of or time needed for performing a task, especially receiving, completing, and returning an assignment.
b. The process of or time needed for loading, unloading, and servicing a ship, airplane, or other vehicle.