DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   trough
       n 1: a narrow depression (as in the earth or between ocean waves
            or in the ocean bed)
       2: a channel along the eaves or on the roof; collects and
          carries away rainwater [syn: gutter, trough]
       3: a concave shape with an open top [syn: bowl, trough]
       4: a treasury for government funds [syn: public treasury,
          trough, till]
       5: a long narrow shallow receptacle
       6: a container (usually in a barn or stable) from which cattle
          or horses feed [syn: manger, trough]