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One-track mind
What is the origin of the idiom "one-track mind" and when to use it?
The idiom "one-track mind" originated from the concept of a train running on a single track, symbolizing a singular focus or preoccupation. It refers to a person who is excessively fixated or obsessed with a particular topic, idea, or desire, often to the exclusion of other thoughts or interests. The phrase is used to emphasize the narrowness of the individual's thinking and their inability to easily shift their attention or consider alternative perspectives.
Example
His one-track mind for money often leads him to make questionable decisions in pursuit of wealth.
Whenever he starts a new hobby, he gets a one-track mind and immerses himself completely in it.
She's so infatuated with her new romantic interest that she has a one-track mind and can't seem to think about anything else.
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