unthinkable
Americanadjective
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inconceivable; unimaginable.
the unthinkable size of the universe.
-
not to be considered; out of the question.
Such a suggestion is unthinkable.
noun
adjective
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not to be contemplated; out of the question
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unimaginable; inconceivable
-
unreasonable; improbable
Other Word Forms
Derived Forms
Inflected Forms
Nouns
Etymology
Origin of unthinkable
late Middle English word dating back to 1400–50; see origin at un- 1, thinkable
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.
Unthinkable now given his 10 goals and six assists have had some of the very best taking notice, especially with speculation over his next move gathering pace given his Fulham deal ends this summer.
From BBC • Mar. 25, 2026
As Chisel dashed through a zigzag performance of “The Unthinkable Is True,” at least five of my major muscle groups decided they were 17 years old.
From Washington Post • Feb. 23, 2023
“Leadership, organization and strategy are not prerequisites,” Charles Kurzman, professor of sociology at the University of North Carolina and author of The Unthinkable Revolution in Iran, said in a phone call.
From Slate • Dec. 22, 2022
"Seinfeld" Seasons 1-9 "Serendipity" "Spy Kids" "Spy Kids 2: The Island of Lost Dreams" "Spy Kids 3: Game Over" "Step Brothers" "The Ugly Truth" "Till Death" "Titanic" "Tommy Boy" "Unthinkable" "Waterworld" "Zodiac"
From Salon • Oct. 2, 2021
Unthinkable to disobey the iron voice from the wall.
From "1984" by George Orwell
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.
