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.
That’s ominous news for retirees who have a lot of their money invested in regular Treasury, municipal and corporate bonds, as most do.
From MarketWatch • Apr. 3, 2026
As ominous as that sounds, Spur co-founder Riley Kilmer says that means I’m proxy-free.
From The Wall Street Journal • Apr. 3, 2026
Goldhaber’s reimagining of an ominous relic from an earlier era of media consumption may capture for audiences the sensation, for better or worse, of what life can be like in an ultra-connected world.
From Los Angeles Times • Mar. 31, 2026
Would he even want to walk into such an ominous situation?
From BBC • Mar. 24, 2026
An ominous buzz rose from the guests, like a hive of bees preparing to swarm.
From "The Interrupted Tale" by Maryrose Wood
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.
