single-file

Column, not abreast

Single-file describes movement or arrangement in a line one behind another, with no one side by side: The hikers walked single-file along the narrow trail.

As a noun, it's the formation itself: They moved in single file.

The term evokes constrained passage—paths too narrow for two abreast, or orderly processions requiring sequential movement.

formation

line

Continuous mark or queue

row · march · chain · succession · parade · convoy · trail · sequence · order · alignment

movement

walking

Locomotion on foot

proceeding · advancing · navigating · traversing · passing · threading · squeezing · footpath · corridor · hallway

computing

document

Written or electronic file

archive · attachment · download · upload · transfer · format · extension · save · folder · directory

Opposites
lateral arrangement

single-fileside-by-side

Positioned next to another

abreast · side by side · shoulder-to-shoulder · in a row · in parallel

formation structure

single-fileclustered

Gathered closely together

bunched · scattered · massed · huddled · grouped

formation order

single-filescattered

Spread irregularly about

dispersed · spread out · clustered · bunched · milling about

Family

single, file, singly, singles, singled, singling, singleton, files, filed

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Everyday, not technical · Rated G