Definitions of needle:

• noun:   a sharp pointed implement (usually steel)
• noun:   a slender pointer for indicating the reading on the scale of a measuring instrument
• noun:   a stylus that formerly made sound by following a groove in a phonograph record
• noun:   as of a conifer
• verb:   goad or provoke,as by constant criticism

  Example: "He needled her with his sarcastic remarks"

• verb:   prick with a needle
• name:  A surname (very rare: popularity rank in the U.S.: #55252)