Keenness or fineness of edge or point.

Sharpness of edge or point.

The quality or fact of being very small in diameter or thickness; slenderness, thinness; (with reference to a point or edge) sharpness.

Sharpness (of a knife, etc.). Also concrete: the point of something sharp. Obsolete.

Sharpness of the point or edge of something or of an angle, pointedness; (also) †spininess, thorniness (obsolete). Also figurative.

With reference to a tool: ability to bite rapidly into a material, keenness. Obsolete.