Listen carefully, then form a single-file line and follow me to the front of the aircraft.

A "queue" in Britain is a single-file line of very patient people.

They moved slowly, crowded into a tight, single-file line by the surging mob.

The security chief instructed his people to remove the barricade from in front of the single-file line.

The warriors strung out in a long, single-file line.

The prisoners would step under these one at a time in a single-file line.

One of the ranking uniforms gathered the survivors into a single-file line.

A single-file line of weary lumbermen stretched from their table across the hail and out the door at the far end.

They invariably rode at the front and rear of the single-file line.

No one yet has purchased rights to the film, but Cook expects a single-file line soon at his door.