- I(New American Roget's College Thesaurus)II(Roget's IV) modif.Syn. foreboding, portentous, threatening, forbidding, fateful, baleful, menacing, sinister, dark, black, lowering, suggestive, ever-threatening, premonitory, dire, direful, ill-omened, grim, gloomy, haunting, perilous, ill-starred, ill-fated, impending, looming, fearful, clouded, unpropitious, inauspicious, unlucky, forewarning, foreshadowing, presaging, prophetic, of evil portent, apocalyptic; see also dangerous 2 , dismal 1 , doomed , frightful 1 , oracular 2 , sinister .Ant. favorable*, encouraging, auspicious.Syn.- ominous implies a threatening character but does not necessarily connote a disastrous outcome [ the request was met by an ominous silence ] ; portentous may imply a foreshadowing, esp. of evil, but is now more often used of that which arouses awe or amazement because of its prodigious or marvelous character [ a portentous event ] ; fateful may imply a fatal character or control by fate, but is now usually applied to that which is of momentous or decisive significance [ a fateful decision ] ; foreboding implies a portent or presentiment of something evil or harmful [ a foreboding anxiety ]III(Roget's 3 Superthesaurus) (VOCABULARY WORD) a.[OM un us]pertaining to omens, portentious, foreboding.A dark cloud on the horizon is particularly ominous to one on a sailboat.SYN.: portentious, foreboding, dreadful, prophetic, menacing, boding evil, inauspicious, threatening, sinister, cautionary.ANT.: boding well, encouraging, heartening, reassuringIV(Roget's Thesaurus II) adjective Portending future disaster: apocalyptic, apocalyptical, baneful, dire, direful, fateful, fire-and-brimstone, grave2, hellflre, portentous, unlucky. See LUCK, WARN.
English dictionary for students. 2013.