A gradual descent can reduce noise by five decibels compared with a stepped landing, because a constant angle of descent needs less engine thrust and keeps aircraft higher for longer.

This will be a slow and gradual descent rather than a singular cataclysm, like the crash of 2008.

That should happen next year, particularly if the dollar continues its gradual descent.

Mercifully, too, it had been, until the last six months, a mostly gradual descent down the intelligence quotient with only the occasional dizzy-making scurry.

The line started its gradual descent as it left the tunnel, generally following the existing ground level and crossing streets at grade.