single-track

adjective
sin·​gle-track | \ ˈsiŋ-gəl-ˈtrak How to pronounce single-track (audio) \

Definition of single-track

1 : having only one track
2 : lacking intellectual range, receptiveness, or flexibility : one-track had a single-track mind incapable of adjusting to changes

First Known Use of single-track

1849, in the meaning defined at sense 1

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