improbable
Americanadjective
adjective
Other Word Forms
Etymology
Origin of improbable
From the Latin word improbābilis, dating back to 1590–1600. See im- 2, probable
Explanation
Your parents might tell you it's improbable that they'll buy you a car when you turn 16. Since improbable means something is unlikely but not impossible, your optimism allows you to keep hoping. The adjective improbable also means statistically unlikely to happen. You might be afraid to fly, but the odds of a plane crash are so low that such an event is improbable. Improbable also means something that is so outrageous that you'd never admit you believed in it. You know the existence of the Loch Ness Monster is improbable, but that doesn't stop you from looking for it when you travel to Scotland.
Vocabulary lists containing improbable
"To Kill a Mockingbird" by Harper Lee, Chapters 20–25
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"A Quilt of a Country," Vocabulary from the argument
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"A Quilt of a Country" by Anna Quindlen
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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.
To almost everyone in this world, outside the AI bubble of Silicon Valley, the idea of scooping up property rights outside of Earth might sound improbable.
From The Wall Street Journal ● Aug. 26, 2026
Prince Harry, who relocates back to Britain shortly with his family, will open a new chapter in his ever-eventful life which once seemed improbable amid royal feuds, battles over security and lawsuits against UK tabloids.
From Barron's ● Aug. 23, 2026
The turkey was fine, and the cheese was technically cheese, though the sandwich had achieved the improbable condition of being simultaneously refrigerator-cold and slightly melted.
From Salon ● Jul. 30, 2026
It seems improbable that Fifa will back down in the same manner.
From BBC ● Jul. 29, 2026
When I look at what seemed at first a highly improbable circumstance, it all seems so amazingly logical.
From "Bad Boy" by Walter Dean Myers
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.
