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unthink

American  
[uhn-thingk] / ʌnˈθɪŋk /

verb (used without object)

unthought, unthinking
  1. to end one's thought or reverse the process of thought.


verb (used with object)

unthought, unthinking
  1. to dispel from the mind.

    Unthink your thoughts.

unthink British  
/ ʌnˈθɪŋk /

verb

  1. to reverse one's opinion about

  2. to dispel from the mind

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of unthink

First recorded in 1590–1600; un- 2 + think 1

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.

See Examples For:

“When I was studying art history, I was told to unthink that notion of the starving artist in the garret,” Gordenker says.

From New York Times Apr. 14, 2021

The problem with thinking a lot about electric cars is that certain things become impossible to unthink: powering a car with fossil fuels, meeting 21st-century challenges with 19th-century answers, become more than irresponsible.

From The Guardian Jul. 10, 2017

Once the mind thinks some thoughts, it cannot unthink them.

From Time Magazine Archive

In a profession which usually makes popularity unthink able, he achieved another unprecedented triumph last summer when New York fans presented him with an automobile as a token of esteem.

From Time Magazine Archive

Well then—if he could think it he could unthink it.

From "The Voyage Of The Frog" by Gary Paulsen

And that in turn prevents you from aimless or unthinking financial behavior.

From MarketWatch Dec. 24, 2025

For all its promise, AI risks instilling in students an unthinking yet false understanding of themselves and society, destroying the morals and habits that make human flourishing possible.

From The Wall Street Journal Dec. 14, 2025

The piece talked down to Roan and diminished her requests as childish and unthinking — ironic for something as petulant as the column reads.

From Salon Apr. 26, 2025

Mr Harvey admitted sending them a letter in April 2017 which he now acknowledged was “crass, inappropriate… unthinking and insensitive”.

From BBC Nov. 30, 2024

He liked that smile, the quick unthinking way it came to her pretty face.

From "A Clash of Kings" by George R.R. Martin

So the unthought provoking former big red head obviously struck a nerve with a few.

From Seattle Times Feb. 22, 2019

Much as I appreciate the TSA’s efforts, I worry that its attempt to develop new screening methodologies will bring new irritations, redirecting our time with the agency in as yet unthought ways.

From Slate Sep. 7, 2017

But once you put it that way, once you step back and see Burke’s writing as a meta-critical defense of unthought tradition, you start to feel the irony of his situation.

From The New Yorker Nov. 1, 2016

It seemed odd to Aly that even a week ago the idea of protest had been something abstract, even unthought of, and if thought about at all, easily dismissed with cynicism.

From Salon Jul. 19, 2015

For the most part it is uninspected, unimagined, unthought, a representation of the thing, and not the thing itself.

From "American Gods" by Neil Gaiman

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