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English definition of “a fine line”

a fine line

(also a thin line)
a very small difference between two things that may seem different: There’s sometimes a very thin line between love and hate. As a comedian, I’m always walking that fine line between humor and sarcasm (= finding a balance between them).
(Definition of a fine line from the Cambridge Academic Content Dictionary © Cambridge University Press)

Definitions of “a fine line” in other dictionaries

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