DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   lack
       n 1: the state of needing something that is absent or
            unavailable; "there is a serious lack of insight into the
            problem"; "water is the critical deficiency in desert
            regions"; "for want of a nail the shoe was lost" [syn:
            lack, deficiency, want]
       v 1: be without; "This soup lacks salt"; "There is something
            missing in my jewelry box!" [syn: miss, lack] [ant:
            feature, have]