Plain English Meaning
It is the moment just before touchdown in a crosswind landing when the pilot eases the nose up to stop the descent, keeps the nose pointed straight down the runway with rudder, and uses aileron pressure toward the wind to stop the airplane from drifting sideways. As the airplane slows, the pilot must keep adding more aileron into the wind.
Full Definition
The transition from final approach descent to the level landing attitude during a crosswind landing, in which the pilot smoothly raises the nose to slow the descent while continuing to hold the airplane aligned with the runway centerline using rudder, and counters drift with aileron into the wind. Throughout , aileron pressure into the wind is increased as bleeds , because the slower the airplane flies the more is needed to produce the same .