XNR has the correct interpretation. Vortex ring is one thing, Settling with Power another.
Another description of settling with power would be the SA365C, with the fixed pitch limit on the collective, where a moderately hot approach could (and sometimes does) finish with plenty of engine power available, but unuseable because the collective has reached its physical limit. Strange bit of French design, which has caused a few heavy landings along the way. I'm sure that there would be other helicopters with a similar feature.