ominous
Americanadjective
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portending evil or harm; foreboding; threatening; inauspicious.
an ominous bank of dark clouds.
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indicating the nature of a future event, for good or evil; having the significance of an omen; being a portent.
Some of these events were immediately ominous, while others only later revealed themselves as such.
adjective
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foreboding evil
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serving as or having significance as an omen
Related Words
Ominous, portentous, threatening, menacing, fateful are adjectives describing that which forebodes a serious, significant, and often harmful outcome. Ominous, derived from omen “a predictor of outcomes,” usually suggests evil or damaging eventualities: ominous storm clouds; an ominous silence. Portentous, although it may suggest evil results, often stresses a momentous or very important outcome: a portentous moment in history; a portentous escalation of hostilities. Threatening may suggest calamity or great harm but sometimes mere unpleasantness: a threatening rumble from the volcano; A threatening look from his brother caused him to quickly change the subject. Menacing always suggests serious damage as an outcome: He advanced with a menacing swagger. Fateful most often stresses the great or decisive importance of what it describes: a fateful encounter between two future leaders; a fateful day that changed our world.
Other Word Forms
- ominously adverb
- ominousness noun
- unominous adjective
- unominously adverb
- unominousness noun
Etymology
Origin of ominous
First recorded in 1580–90; from Latin ōminōsus “portentous,” equivalent to ōmin- (stem of ōmen ) + -ōsus; omen, -ous
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
But if you thirst for a sober-minded investigation into this ominous tool — one with an approach that treats you like the intelligent being you are — you’ll have to wait for AI doc 2.0.
From Los Angeles Times • Mar. 27, 2026
The shellacking that big bank stocks have taken as of late could be an ominous sign about what’s next for the economy.
From Barron's • Mar. 18, 2026
More ominous is the movement in the bond market’s expectations of where inflation is headed.
From MarketWatch • Mar. 18, 2026
In an ominous sign of the struggle to come, Raducanu was broken in the opening game.
From BBC • Mar. 8, 2026
What did worry him to no end was the ominous fit between Burr’s political skills and the opportunities for mischief so clearly available in a nation whose laws and institutions were still congealing.
From "Founding Brothers: The Revolutionary Generation" by Joseph J. Ellis
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
