Plain English Meaning
The portion of the circle where the wind is pushing the airplane along, making it travel faster across the ground. To keep the same distance from the point on the ground, the pilot has to bank more steeply during this part of the turn.
Full Definition
In a turn around a point, the half of the circular ground track during which the airplane is flying with a tailwind component. Because groundspeed is highest in this half, the pilot must use the steepest bank angles here to maintain a constant-radius circle around the reference point.
Context Anchor
Seen when practicing turns around a point and other ground-reference maneuvers where wind changes the airplane’s path the ground.