/ ˈtɜːnəraʊnd; NAmE ˈtɜːrn-/ ( BrE also turn·round ) noun [ usually sing. ]
1.
the amount of time it takes to unload a ship or plane at the end of one journey and load it again for the next one
2.
the amount of time it takes to do a piece of work that you have been given and return it
3.
a situation in which sth changes from bad to good :
a turnaround in the economy
4.
a complete change in sb's opinion, behaviour, etc.