Definition of "single file" []

• A line of people, animals, or things standing or moving one behind the other. Also called Indian file. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "They hurried forward in single file at a run, making and compacting a path in the snow as they went, their heads held low against the blizzard, covering the locks of their guns with the lappets of their coats."
• "The large, formidable-looking woman whom Kitty resembled had to be her mother, Reva Setterton, dressed in tissue-thin bright green silk, with huge gold buttons parading single file down to her hem."
• "In single file the train measured fifteen miles long, but it traveled on a broad front three miles thick; two under-strength legions of four thousand men each were permanently seconded to guarding such an immense and precious adjunct of war; Oppius Statianus was in command, and grumbling about it to anyone who would listen."