He felt himself drawn round in a gradually narrowing line, from which they could not get free.

By trial and error, the two gradually narrowed the options.

After narrowing gradually, the channel suddenly opened wide to the east.

The open walkway gradually narrowed, as the wall closed in against the lake.

Each juror gradually narrowed his or her choices until a single selection was made.

The gorge gradually narrows from 20 yards to a few feet.

Gorge gradually narrows from 20 yards to a few feet.

To my left the greenish water gradually narrowed and deepened.

Psychopathy has a long history from an initially very general concept that gradually narrowed to the current one.

As mentioned above, the windows were gradually narrowed and, since 1923, one pantograph was removed from each car.