ˈ ̷ ̷ˌ ̷ ̷ adjective
1.
a. : that lacks flexibility and nimbleness and can handle only one thing at a time
is an unimaginative person and has a one-track mind
b. : marked by often narrowly constricted attention to or absorption in just one thing
a one-track party member
2. : that lacks variety or breadth : limited in scope : undiversified
areas where one-track farming has been the rule — A.J.Bruwer