What is the meaning of exactly?

adverb

• Indicating exactness or preciseness.
  • usage: "he was doing precisely (or exactly) what she had told him to do"; "it was just as he said-the jewel was gone"; "it has just enough salt"
  • synonyms: precisely, just
• Just as it should be.
  • usage: "`Precisely, my lord,' he said"
  • synonyms: precisely, on the nose, on the dot, on the button
• In a precise manner.
  • usage: "she always expressed herself precisely"
  • synonyms: precisely, incisively