What is the meaning of sharp?

noun

• A musical notation indicating one half step higher than the note named.
• A long thin sewing needle with a sharp point.

adjective

• Of something seen or heard. ( clearly defined)
  • usage: "a sharp photographic image"; "the sharp crack of a twig"; "the crisp snap of dry leaves underfoot"
  • synonyms: crisp
• Ending in a sharp point.
  • synonyms: acuate, acute, needlelike
• Having or demonstrating ability to recognize or draw fine distinctions.
  • usage: "an acute observer of politics and politicians"; "incisive comments"; "icy knifelike reasoning"; "as sharp and incisive as the stroke of a fang"; "penetrating insight"; "frequent penetrative observations"
  • synonyms: acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing
• Marked by practical hardheaded intelligence.
  • usage: "a smart businessman"; "an astute tenant always reads the small print in a lease"; "he was too shrewd to go along with them on a road that could lead only to their overthrow"
  • synonyms: astute, shrewd
• Harsh.
  • usage: "sharp criticism"; "a sharp-worded exchange"; "a tart remark"
  • synonyms: sharp-worded, tart
• Having or emitting a high-pitched and sharp tone or tones .
  • usage: "a shrill whistle"; "a shrill gaiety"
  • synonyms: shrill
• Extremely steep.
  • usage: "an abrupt canyon"; "the precipitous rapids of the upper river"; "the precipitous hills of Chinese paintings"; "a sharp drop"
  • synonyms: abrupt, precipitous
• Keenly and painfully felt; as if caused by a sharp edge or point.
  • usage: "a sharp pain"; "sharp winds"
• Having or made by a thin edge or sharp point; suitable for cutting or piercing.
  • usage: "a sharp knife"; "a pencil with a sharp point"
• Of a musical note. ( raised in pitch by one chromatic semitone)
  • usage: "C sharp"
• Very sudden and in great amount or degree.
  • usage: "a sharp drop in the stock market"
• Quick and forceful.
  • usage: "a sharp blow"

adverb

• Changing suddenly in direction and degree.
  • usage: "the road twists sharply after the light"; "turn sharp left here"; "the visor was acutely peaked"; "her shoes had acutely pointed toes"
  • synonyms: sharply, acutely