DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Collier \Col"lier\, n. [OE. colier. See Coal.]
      1. One engaged in the business of digging mineral coal or
         making charcoal, or in transporting or dealing in coal.
         [1913 Webster]
      2. A vessel employed in the coal trade.
         [1913 Webster]