Plain English Meaning
It's the right way to get out of a spiral dive: level the wings first, then ease the nose back up. Pulling back on the controls before the wings are level can break the airplane.
Full Definition
A spiral dive recovery technique in which the pilot first reduces power and rolls the wings level using coordinated aileron and rudder, and only then applies smooth back pressure on the elevator to recover from the dive. The roll-out and pull-out are sequenced — wings level first, then pitch up — to avoid the .