razor edge

1. 1.

   an edge that is as sharp as the cutting side of a razor

   Broaderedge

Questions about razor edge

What does razor edge mean?

razor edge means "an edge that is as sharp as the cutting side of a razor".

Is razor edge a common word?

razor edge is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.