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1. Indicating exactness or preciseness
   "he was doing exactly what she had told him to do";
   - precisely, just, properly
    
2. Just as it should be
   "'exactly, my lord,' he said";
   - precisely, on the nose [informal], on the dot [informal], on the button [informal]
    
3. In a precise manner
   "she always expressed herself exactly";
   - precisely, incisively

Encyclopedia: Exactly