turn ‧ a ‧ round /ˈtɜːnəraʊnd $ ˈtɜːrn-/ BrE AmE ( also turnround British English ) noun [singular]
1 . the time it takes to receive something, deal with it and send it back, especially on a plane, ship etc:
The average turnaround for a passport application is six working days.
We must reduce costs and shorten turnaround times.
2 . a complete change from a bad situation to a good one
turnaround in
the remarkable turnaround in our economy
⇨ turn around at ↑ turn 1
3 . a ↑ turnabout