The trenches grew progressively narrower and shallower, so that eventually we became a kind of human chain, bent nearly double in order to remain unseen.

It had a wide base, becoming progressively narrower as it got higher.

As he watched, the single elongated tube of force split itself into two, then four, then eight and more progressively narrower tubes.

Since then, they had proceeded due north into a canyon that was growing progressively narrower and more difficult to navigate.

The wooden door frame consists of three sets of flat boards, becoming progressively narrower toward the doorway.

Ice chasms in general were like a big V, wide at the top and progressively narrower as you got toward the bottom.

The trail became progressively narrower, twisting as it ran down the hillside.

In (c) a thin rod is passed progressively narrower draw plates.

He also knew how a career officer, focusing on constant threats of war, could find his definition of "the big picture" getting progressively narrower.

In principle, progressively narrower cylinders can be used to find the centroid to arbitrary accuracy.