Learner's definition of TURNAROUND
the time it takes someone to receive, deal with, and return something
the process of making something (such as an airplane) ready for use again after it has arrived at a place
a complete change from a bad situation to a good situation, from one way of thinking to an opposite way of thinking, etc.
see also turn around at 1turn
The team needs a big turnaround after their loss last week.
The company has achieved a remarkable turnaround in the past year.
The latest news has caused a turnaround in public opinion.