DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   lockbox \lock"box`\, n.
      A box of strong and durable construction, fitted with a lock,
      used for the purpose of protecting valuable items, such as
      money or jewelry; a strongbox.
      [PJC]