A mind limited to only one line of thought or action, as in All you think about is sex—you have a one-track mind. This expression, alluding to a train that runs only on one track or in one direction, was first recorded in 1928.
LEARN THE SPANISH WORDS FOR THESE COMMON ANIMALS!
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How do you say “cat” 🐈 in Spanish?
Words nearby one-track mind
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.