[sing-guh l-trak]
  1. (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.
  2. having a narrow scope; one-track: He has a single-track mind.

Origin of single-track

An Americanism dating back to 1825–35 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for single-track

Historical Examples of single-track

  • That cutting-wheel approximates the width of a single-track in diameter.

    The Modern Railroad

    Edward Hungerford

  • You are standing with him beside a curving bit of single-track.

    The Railroad Problem

    Edward Hungerford

  • 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

    Robert Chambers

  • "You've sure got a single-track mind, boy," Strawn chuckled.

    Murder at Bridge

    Anne Austin

British Dictionary definitions for single-track


  1. (of a railway) having only a single pair of lines, so that trains can travel in only one direction at a time
  2. (of a road) only wide enough for one vehicle
  3. able to think about only one thing; one-track
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012