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Found one definition

1.                 From English-Hindi FreeDict Dictionary ver. 1.6:
                   
   
   
                   
                     
   trough /tɹˈɒf/ <N>
   1. नाँद
         "The trough is filled with grains."
   2. नाली
         "They allowed the water to pass through the trough."
   3. कम~दबाव~का~क्षेत्र
         "There is trough in the Bay of Bengal."
   4. बहुत~कम~आर्थिक~कार्य
         "The market showed profit from the trough of recession."
   5. गर्त
         "He is surfing in the trough and going towards the shore."