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)

A sight or view of the interior of anything; a deep inspection or view; introspection; frequently used with into.

* 1980 , Carl Sagan, Cosmos: A Personal Voyage ,

The history of our study of our solar system shows us clearly that accepted and conventional ideas are often wrong, and that fundamental insights can arise from the most unexpected sources.

Power of acute observation and deduction; penetration; discernment; perception.

(marketing) Knowledge (usually derived from consumer understanding) that a company applies in order to make a product or brand perform better and be more appealing to customers

The act or result of apprehending the inner nature of things or of seeing intuitively

(artificial intelligence) An extended understanding of a subject resulting from identification of relationships and behaviors within a model, context, or scenario.