| ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : having but one track
a single-track railroad
2. : lacking intellectual range, receptiveness, or flexibility : one-track
with a single-track mind devoted solely to his duty — Leo Crane
| ̷ ̷ ̷ ̷| ̷ ̷ adjective
1. : having but one track
a single-track railroad
2. : lacking intellectual range, receptiveness, or flexibility : one-track
with a single-track mind devoted solely to his duty — Leo Crane
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012