portentous
     adj 1: of momentous or ominous significance; "such a
            portentous...monster raised all my curiosity"- Herman
            Melville; "a prodigious vision" [syn: {prodigious}]
     2: of ominous significance [syn: {fateful}, {foreboding(a)}]
     3: puffed up with vanity; "a grandiloquent and boastful
        manner"; "overblown oratory"; "a pompous speech";
        "pseudo-scientific gobbledygook and pontifical hooey"-
        Newsweek [syn: {grandiloquent}, {overblown}, {pompous}, {pontifical}]
Source: WordNet® 2.0