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.
When I was a deacon, the ominous signs of the Great Depression began to appear. Tens of thousands lost their jobs. Money was scarce. Families had to do without. Some young people did not ask their mothers, 'What's for dinner?' because they knew all too well that their cupboards held very little. Joseph B. Wirthlin
The past is an old armchair in the attic, the present an ominous ticking sound, and the future is anybody's guess. James Thurber
What is ominous is the ease with which some people go from saying that they don't like something to saying that the government should forbid it. When you go down that road, don't expect freedom to survive very long. Thomas Sowell
The library, with its Daedalian labyrinth, mysterious hush, and faintly ominous aroma of knowledge, has been replaced by the computer's cheap glow, pesky chirp, and data spillage. P. J. O'Rourke
Under the ominous shadow which the second World War and its attendant circumstances have cast on the world, peace has become as essential to civilized existence as the air we breathe is to life itself. Cordell Hull