sharpness

plural sharpnesses

1. uncountablethe cutting ability of an edge; keenness.

   Synonyms: keenness

2. uncountablethe fineness of the point a pointed object.
3. countableThe product or result of being sharp.

   The first thing that strikes the stranger is the sharpness of the curves on the metre gauge; it is not unusual for a long train to be travelling in three directions at once, and the engine is frequently in full view of the windows of the ninth or tenth carriage.

   1950 April 28, Timothy H. Cobb, “The Kenya-Uganda Railway”, in Railway Magazine, page 263

4. countableuncountablepungency or acidity.

   Synonyms: acidity, acridity, piquancy, pungency, sourness

5. countableuncountabledistinctness, focus.
6. countableuncountableacuteness or acuity.

   A lack of match sharpness was perhaps to blame for Rooney squandering England's best chance after 27 minutes.

   2012 June 19, Phil McNulty, “England 1-0 Ukraine”, in BBC Sport

   1 more example

   Mrs. PAGE is gifted with a pleasing voice, which is yet imperfectly weeded of certain sharpnesses, but seems susceptible of a wide range of melodious inflection.

   1861 June 14, “Amusements.”, in The New York Times

7. countableobsoleteuncountableedge or blade

   also thei smytiden bi the scharpnesse of swerd, oxun, and scheep, and assis.

   ca. 1395, John Wycliffe et al., Joshua 6:21

   1 more example

   CUT-WATER, or KNEE OF THE HEAD [S.] the ſharpneſs of the head of the ſhip, below the beak;

   1760, John Marchant, Gent. Mr. Gordon, Daniel Bellamy, and others., A New Complete English Dictionary...

1. An inland port in Hinton parish, Stroud district, Gloucestershire, England (OS grid ref SO6702).