- (of a railroad or section of a railroad's route) having but one set of tracks, so that trains going in opposite directions must be scheduled to meet only at points where there are sidings.
- having a narrow scope; one-track: He has a single-track mind.
Origin of single-track
An Americanism dating back to 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for single-track
That cutting-wheel approximates the width of a single-track in diameter.The Modern Railroad
You are standing with him beside a curving bit of single-track.The Railroad Problem
The railroad was single-track, so trains could pass only where there was a siding.Tom Strong, Lincoln's Scout
Alfred Bishop Mason
"Mine is a single-track mind," he remarked as though to himself.The Slayer Of souls
"You've sure got a single-track mind, boy," Strawn chuckled.Murder at Bridge
- (of a railway) having only a single pair of lines, so that trains can travel in only one direction at a time
- (of a road) only wide enough for one vehicle
- able to think about only one thing; one-track