- having only one track.
- unable or unwilling to cope with more than one idea, action, etc., at a time; narrow: a one-track mind.
Origin of one-track
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for one-track
They are like a one-track railroad that has been congested with traffic.Humanly Speaking
Samuel McChord Crothers
We parted with mutual benedictions, and John Maxwell and I walked away, toward the one-track road leading to the old mansion.The Telenizer
I must have journeyed on at least three small, one-track railroads after leaving the Pullman at some junction or other.
Once his one-track mind got to functioning on a certain objective it seldom digressed.
"Thank God that thing had a one-track mind, and was concentrating on the spider," said Jim, with a rather humorless laugh.The Raid on the Termites
- informal obsessed with one idea, subject, etc
- having or consisting of a single 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