one-track

[ wuhn-trak ]
/ ˈwʌnˌtræk /

adjective

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

Example sentences from the Web for one-track

British Dictionary definitions for one-track

one-track

adjective

informal obsessed with one idea, subject, etc
having or consisting of a single track