Plain English Meaning
A training exercise where you fly a rectangle-shaped path over a field on the ground, keeping the same height and the same distance from each edge, while adjusting for the wind so the shape stays straight and even.
Full Definition
A ground reference maneuver in which the pilot flies a rectangular path over the ground at a constant altitude, adjusting bank angle and crab angle on each leg to compensate for wind and maintain a uniform distance from the boundaries of the rectangle.
Context Anchor
Seen in basic flight training when practicing ground reference maneuvers before learning or refining traffic pattern .