Noun

(uncountable) the cutting ability of an edge; keenness

(uncountable) the fineness of the point a pointed object

(countable) The product or result of being sharp.

(of food etc) pungency or acidity

(of an image) distinctness, focus

(of intelligence) acuteness or acuity

*{{quote-news

, year=2012 , date=June 19 , author=Phil McNulty , title=England 1-0 Ukraine , work=BBC Sport citation , page= , passage=A lack of match sharpness was perhaps to blame for Rooney squandering England's best chance after 27 minutes.}}

(obsolete) edge or blade

*{{quote-book

, year=1760 , author=John Marchant, Gent. Mr. Gordon, Daniel Bellamy, and others. , title=A New Complete English Dictionary... citation , passage=CUT-WATER, or KNEE OF THE HEAD [S.] the ?harpne?s of the head of the ?hip, below the beak;}}

*{{quote-book

, year=ca. 1395 , author=John Wycliffe et al. , title=Joshua 6:21 citation , passage=also thei smytiden bi the scharpnesse of swerd, oxun, and scheep, and assis.}}

Noun

(en-noun)

(eulogistic) Someone possessing extraordinary intelligence or skill; especially somebody who has demonstrated this by a creative or original work in science, music, art etc.

*

, title=(The Celebrity), chapter=1 , passage=In the old days, to my commonplace and unobserving mind, he gave no evidences of genius whatsoever. He never read me any of his manuscripts, […], and therefore my lack of detection of his promise may in some degree be pardoned.}}

Extraordinary mental capacity.

Inspiration, a mental leap, an extraordinary creative process.

(Roman mythology) The guardian spirit of a place or person.

A way of thinking, optimizing one's capacity for learning and understanding.