Definitions of sharp:

• noun:   a long thin sewing needle with a sharp point
• noun:   a musical notation indicating one half step higher than the note named
• adjective:   raised in pitch by one chromatic semitone

  Example: "C sharp"

• adjective:   harsh

  Example: "Sharp criticism"

• adjective:   having or made by a thin edge or sharp point; suitable for cutting or piercing

  Example: "A sharp knife"

• adjective:   keenly and painfully felt; as if caused by a sharp edge or point

  Example: "A sharp pain"

• adjective:   quick and forceful

  Example: "A sharp blow"

• adjective:   very sudden and in great amount or degree

  Example: "A sharp drop in the stock market"

• adjective:   marked by practical hardheaded intelligence
• adjective:   (of something seen or heard) clearly defined

  Example: "A sharp photographic image"

• adjective:   high-pitched and sharp
• adjective:   very penetrating and clear and sharp in operation

  Example: "Of sharp and active intellect"

• adjective:   ending in a sharp point
• adjective:   extremely steep

  Example: "A sharp drop"

• adjective:   sour or bitter in taste
• adjective:   having or demonstrating ability to recognize or draw fine distinctions

  Example: "As sharp and incisive as the stroke of a fang"

• adverb:   changing suddenly in direction and degree

  Example: "The road twists sharply after the light"

• name:  A surname (common: 1 in 3030 families; popularity rank in the U.S.: #332)