fine line
A difference, albeit vague and difficult to discern.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“There is a fine line between being funny and being rude.”
“As a manager, you must walk a fine line between being supportive and being too strict with your team.”
“The author explores the fine line between genius and madness, suggesting that the two states of mind are often closer than we care to admit.”
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blur the line
To minimize or erode the distinction between two things.
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bottom line
The summary or result; the most important information.
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bottom of the line
The worst or lowest quality on the market, especially among a range of products.
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bright line
A clear distinction in the context of a legal, moral, ethical, or analytical judgment.
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chance'd be a fine thing
Synonym of no chance or fat chance, with a somewhat more cheerful attitude.
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clear one's lines
To clear the ball away from a dangerous position.
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cross the line
To overstep a boundary, rule, or limit; to go too far or do something unacceptable.
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down to a fine art
To a point of exceptional proficiency.
Last updated August 10, 2026