Dictionary.com
Thesaurus.com

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

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

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

From Time Magazine Archive

Now that I’ve thought it and said it, I can’t unthink it and unsay it.

From "The Sun Is Also a Star" by Nicola Yoon

He seems like an unthinking product of opportunity.

From The Wall Street Journal Mar. 26, 2026

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

From MarketWatch Dec. 24, 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

Turning to "Holidays in the Sun," this track offers a less graphic critique of unthinking behaviors than “Bodies,” instead using consumerist culture and social disillusionment for its targets.

From Salon Jan. 30, 2024

My feeling remains, no less than before, that this represents a piece of unthinking snobbery on the part of the Society.

From "The Remains of the Day" by Kazuo Ishiguro

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

She hadn’t meant to put it that way, but it came out unthought.

From "Lyddie" by Katherine Paterson

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training