foreboding
     adj : of ominous significance [syn: {fateful}, {foreboding(a)}, {portentous}]
     n 1: a feeling of evil to come; "a steadily escalating sense of
          foreboding"; "the lawyer had a presentiment that the
          judge would dismiss the case" [syn: {premonition}, {presentiment},
           {boding}]
     2: an unfavorable omen
Source: WordNet® 2.0