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1.                 From English-Hindi FreeDict Dictionary ver. 1.6:
                   
   
   
                   
                     
   operation /ˌɒpəɹˈeɪʃən/ <N>
   1. चीर~फाड़
         "The patient was said to undergo an operation."
   2. संचालन
         "That rule is no longer in operation."
   3. कार्यवाही
         "It was a joint operation of the navy and air force."