Plain English Meaning
Training where you actually fly an airplane to learn how to spot, avoid, and recover from situations where the airplane ends up in an unintended attitude—like an unexpected steep bank, nose-high climb, or nose-low dive. You feel the real forces and practice the recoveries in the air, not on a screen.
Full Definition
Upset Prevention and Recovery Training conducted in an actual airplane (rather than in a flight simulator or training device), in which the pilot experiences and practices recognizing, preventing, and recovering from developing or fully developed airplane upsets in real flight conditions. It is delivered by a qualified instructor in an aircraft approved and equipped for the being flown, including , , and recoveries from nose-high and nose-low upsets.