Longman Dictionary of Contemporary English
razor-thin
adjective
EXAMPLES FROM CORPUS
▪ Years of price wars, for example, have created razor-thin margins in personal computers.
The Collaborative International Dictionary
razor-thin
razor-thin \ra"zor-thin\ a. as thin as a razor blade; very thin.
Wiktionary
razor-thin
a. 1 Extremely fine; so thin as to be almost invisible. 2 A very small difference, or advantage, when comparing two items. alt. 1 Extremely fine; so thin as to be almost invisible. 2 A very small difference, or advantage, when comparing two items.
Usage examples of "razor-thin".
His wide, downcurved mouth was framed by a thick black moustache and a beard that was no more than a razor-thin line of hair tracing the enormous width of his jaw.
A razor-thin flow of Air sliced the fellow's beard in two as it took off his head.