the total time consumed in the round trip of a ship, aircraft, vehicle, etc.
change of allegiance, opinion, mood, policy, etc.
a place or area having sufficient room for a vehicle to turn around.
the time required between receiving and finishing or processing work or materials.
6. Commerce. a.
a reversal, as in business sales, especially from loss to profit.
the time between the making of an investment and receiving a return.
Aviation. the elapsed time between an aircraft's arrival at an airfield terminal and its departure.
1925–30; noun use of verb phrase turn around