DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   call-back \call-back\ n.
      1. a return call, especially a telephone call.
         [WordNet 1.5]
      2. the recall of an employee to work after a layoff.
         [WordNet 1.5]