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Definition of ominous:

  1. Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; - formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious; as, an ominous dread.


foreshadowing, fateful, lowering, baleful, of evil portent, unfortunate, heavy, direful, apocalyptic, forbidding, untoward, doomed, prophetic, oracular, dire, fateful, inauspicious, frightful, luck, fire-and-brimstone, adverse, grim, hellfire, haunting, apocalyptic, looming, ugly, suggestive, ill-starred, unlucky, unlucky, forewarning, sullen, dark, apocalyptical, alarming, sick, minatory, sinister, premonitory, ever-threatening, gloomy, minacious, ill-omened, ill, fearful, warn, portentous, grave, dismal, impending, dour, dire, portentous, threatening, ill-fated, baneful, menacing, direful, presaging, clouded, unpropitious, black, apocalyptical.

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