one-track

[wuhn-trak]

adjective

1. having only one track.

2. unable or unwilling to cope with more than one idea, action, etc., at a time; narrow.

   a one-track mind.

one-track

adjective

1. informal,  obsessed with one idea, subject, etc

2. having or consisting of a single track

Word History and Origins

Origin of one-track¹

First recorded in 1925–30