fine line

noun

: a very small difference

There's a fine line between being helpful and being intrusive.

There's sometimes only a very fine line between genius and madness.

Examples of fine line in a Sentence

Recent Examples on the Web

Sure, there is a fine line between delusion and conviction, but on Sunday, the 49ers walked it perfectly. —Dieter Kurtenbach, Mercury News, 12 Jan. 2026

Common exfoliators and fine line-eliminators like retinol and glycolic acid are too harsh on my skin, but this serum utilizes lactic acid, which is far more gentle but just as potent. —Kaitlin Clapinski, InStyle, 11 Jan. 2026

At the same time, executives need to tread a fine line with the president, who is pressing them to swiftly pledge new investments. —Bloomberg Wire, Dallas Morning News, 10 Jan. 2026

One assumes it’s taken this long to find a neurologist who will get silly about a serious exam designed to find the fine line between normal aging and the big uh-oh of dementia. —Bethy Squires, Vulture, 9 Jan. 2026

Rhymes for fine line

• acridine
• alkaline
• andesine
• anodyne
• anticline
• arginine
• asinine
• atropine
• benzidine
• borderline
• byzantine
• calamine