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Found one definition

1.                 From English-Hindi FreeDict Dictionary ver. 1.6:
                   
   
   
                   
                     
   reservoir /ɹˈɛzəvwˌɑː/ <N>
   1. जलाशय
         "He has made a huge reservoir of water for summer."
   2. गुहिका~जिसमे~द्रव्य~भरा~हो
         "The gall bladder is a reservoir of the bile juice."
   3. खजाना
         "She is a reservoir of wisdom."