(idiomatic) A difference, albeit vague and difficult to discern.
Fine-line Sentence Examples
There was a fine line between being frugal and being a miser.
He'd been trying to walk that fine line all night.
There was a fine line between protecting and smothering, though.
East of Wasdale lies the range of Scafell (q.v.), its chief points being Scafell (3162 ft.), Scafell Pike (3210), Lingmell (2649) and Great End (2984), while the line is continued over Esk Hause Pass (2490) along a fine line of heights (Bow Fell, 2960; Crinkle Crags, 2816), to embrace the head of Eskdale.
When the wire was heated by an electric current a fine line of vapour descended from each drop. The pipe was closed at the centre by a membrane which prevented a through draught, yet permitted the vibrations, as it was at a node.