• WordNet 3.6
    • adj ominous presaging ill fortune "ill omens","ill predictions","my words with inauspicious thunderings shook heaven"- P.B.Shelley","a dead and ominous silence prevailed","a by-election at a time highly unpropitious for the Government"
    • adj ominous threatening or foreshadowing evil or tragic developments "a baleful look","forbidding thunderclouds","his tone became menacing","ominous rumblings of discontent","sinister storm clouds","a sinister smile","his threatening behavior","ugly black clouds","the situation became ugly"
    • ***
Webster's Revised Unabridged Dictionary
    • a Ominous 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. "He had a good ominous name to have made a peace.""In the heathen worship of God, a sacrifice without a heart was accounted ominous ."
    • ***
Century Dictionary and Cyclopedia
    • ominous Conveying some omen; serving as a sign or token; significant.
    • ominous Of good omen; auspicious.
    • ominous Of ill omen; giving indication of coming ill; portentous; inauspicious; unlucky.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Ominous om′in-us pertaining to, or containing, an omen: foreboding evil: inauspicious
    • ***


  • William S. Burroughs
    “There is the pleasurable orgasm, like a rising sales graph, and there is the unpleasurable orgasm, slumping ominously like the Dow Jones in 1929.”


Webster's Revised Unabridged Dictionary
L. ominosus, fr. omen,. See Omen


In literature:

She had passed Immelan in the entrance, and there was something ominously disturbing in his cool, triumphant smile.
"The Great Prince Shan" by E. Phillips Oppenheim
She sat as if turned to stone, staring at the ominous words.
"Out of the Ashes" by Ethel Watts Mumford
A dog, ominous, lifted his voice in a long, mournful howl which made mothers put out their hands to their babes.
"The Covered Wagon" by Emerson Hough
The ice cracked ominously, but did not break.
"The Rover Boys In The Mountains" by Arthur M. Winfield
She caught an ominous gleam in the stern eyes, but almost immediately they softened.
"The Tidal Wave and Other Stories" by Ethel May Dell
The black wings of apostasy, as of an ominous bird, were stretched from sea to sea.
"Sketches of the Covenanters" by J. C. McFeeters
It was a strange and ominous sight.
"Blackwood's Edinburgh Magazine, No. CCCXLII. Vol. LV. April, 1844" by Various
He said nothing further, but to Stella his silence was ominous.
"The Lamp in the Desert" by Ethel M. Dell
She had something of the ominous air of a tragedy queen who is foreshadowing an approaching climax.
"No. 13 Washington Square" by Leroy Scott
The situation was ominous enough at this point.
"The Mississippi Bubble" by Emerson Hough

In poetry:

To me, the waves that ceaseless broke
Upon the dangerous coast,
Hoarsely and ominously spoke
Of all my treasure lost.
"To The Rev. Mr. Newton, On His Return From Ramsgate" by William Cowper
Lo! the red moon from the ocean's low hazes
Rises in ominous grandeur to view;
Strange is its face as my tortur'd eye gazes
O'er the vast reaches of sparkle and blue.
"The Bride Of The Sea" by Howard Phillips Lovecraft
Throughout man's life do themes of all kinds
Come and go. Now the ultimate of themes has come,
Frightening in our fantasy - the paling of the face,
An ominous shadow, and the death knell tolls.
"The Themes" by Migjeni
And there in the ominous vast calm
They'll harbour, like enchanted
Chill shapes he has strangely conjured from
The silence of his masterdom;
There float till again they feel the qualm
Of hunger thro them panted.
"In Time Of Awe" by Cale Young Rice
I saw the lover and maid at the altar,
Bound by the bands divine;
Heard the responses—they fail not nor falter—
Saw the guests pledge in wine.
Howl, howl, ominous Owl,
Shriek of the terrible tempest's scowl.
"What I Have Seen #2" by Ella Wheeler Wilcox
Here we were wedded.--Ask the years
How such could be, while over us
A sword of wrath swung ominous,
And on our cheeks its breath was fierce!
All I remember is--'twas thus,
And Margaret's eyes were wet with tears.
"The Brothers" by Madison Julius Cawein

In news:

The failure of the Joint Select Committee on Deficit Reduction - the Supercommittee - to cut US government spending is an ominous sign of the times, but the opportunity to revisit dairy policy reform may be one silver lining.
Hole is built from old lumber, and there's something very ominous about it.
This weekend, (August 18th 2012) marks a slightly ominous anniversary in Anchorage history.
In the 1700s, Great Britain had a debt burden that was even more ominous than the $16 trillion the US government now owes.
In the grays of winter, the last stop on any subway line can have a lonely, ominous feel.
The internet has been freaking out all weekend over an ominously-titled surveillance program called "TrapWire," after it showed up in some leaked Wikileaks emails.
Sandy hit New York on Monday evening with the fury promised by ominous forecasts and left behind a wake of devastation wrought by the 80 m.p.w.-plus winds and extensive flooding of lower Manhattan.
Studios bank on increasingly ominous superhero epics.
Iraq's ominous trendline of violence.
On this fall night, darkness had reached the block before she had, and ominous shadows played around her.
Alaska in film is often ominous: intriguing and beautiful, but deadly.
Hundreds of Still's paintings were sealed off from the public for years while ominous rumors about their condition circulated.
This would be a historic and ominous break from the past.
The New York Times condemns the right-wing campaign against three justices of the Florida Supreme Court and sees an ominous pattern.
ST MARYS — Like the ominous-looking clouds surrounding the soccer field at West School on Monday night, the St Marys boys soccer team threatened for much of the evening.

In science:

The second pro jection gives a morphism π : E → Omin , which is a resolution of singularities, with exceptional fiber the null section.
Cohomology of the minimal nilpotent orbit
So we have an isomorphism from F minus the null section onto Omin .
Cohomology of the minimal nilpotent orbit
Thus we find the same result as in section 3 for the cohomology of Omin in type An−1 .
Cohomology of the minimal nilpotent orbit
Lemma 2 ensures that there is a unique minimal biorientation in ˆS , hence A admits a unique minimal pseudo d/(d−2)-orientation, denoted Omin .
A bijection for triangulations, quadrangulations, pentagulations, etc
Since σ(O′ A ) is accessible from vb , we conclude that σ(Omin ) is also accessible from vb , hence Omin is accessible from all boundary vertices of A.
A bijection for triangulations, quadrangulations, pentagulations, etc