DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   calk
       n 1: a metal cleat on the bottom front of a horseshoe to prevent
            slipping [syn: calk, calkin]
       v 1: provide with calks; "calk horse shoes"
       2: seal with caulking; "caulk the window" [syn: caulk, calk]
       3: injure with a calk