razor edge an edge that is as sharp as the cutting side of a razor
edge -
the outside limit of an object or area or surface; a place farthest away from the center of something; "the edge of the leaf is wavy"; "she sat on the edge of the bed"; "the water's edge"
demarcation line,
demarcation,
limit the greatest possible degree of something; "what he did was beyond the bounds of acceptable behavior"; "to the limit of his ability"
border a strip forming the outer edge of something; "the rug had a wide blue border"
hem the edge of a piece of cloth; especially the finished edge that has been doubled under and stitched down; "the hem of her dress was stained"; "let down the hem"; "he stitched weights into the curtain's hem"; "it seeped along the hem of his jacket"
edge -
The thin cutting side of the blade of an instrument; as, the edge of an ax, knife, sword, or scythe. Hence, figuratively, that which cuts as an edge does, or wounds deeply, etc.
edge -
Any sharp terminating border; a margin; a brink; extreme verge; as, the edge of a table, a precipice.
edge -
Sharpness; readiness or fitness to cut; keenness; intenseness of desire.
edge -
The border or part adjacent to the line of division; the beginning or early part; as, in the edge of evening. "On the edge of winter. " John Milton.
edge -
The edge of a cricket bat.
edge -
Any of the connected pairs of vertices in a graph.