Plain English Meaning
The ground-school side of the training. It's the part where the pilot learns the concepts, theory, and procedures on the ground before practicing them in the airplane.
Full Definition
In Upset Prevention and Recovery Training (UPRT), the classroom or ground-based instructional portion of training that delivers the theoretical knowledge — aerodynamics, human factors, recognition cues, and recovery procedures — required before and alongside the in-aircraft flight portion.
Context Anchor
Seen in training syllabi and FAA guidance for upset prevention and recovery training, where the knowledge portion is separated from the practice portion.