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flat-earther

American  
[flat-ur-ther] / ˈflætˈɜr θər /

noun

  1. a person who adheres to the idea that the earth is flat.

  2. a person who clings to an idea or theory that has long been proved wrong.


flat-earther British  

noun

  1. informal a person who does not accept or is out of touch with the realities of modern life

"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 flat-earther

1930–35; flat earth + -er 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:

“It’s like asking a flat-earther to pilot our next mission to space.”

From Salon ● Nov. 15, 2024

“Had there been a follow up to my statement that I had been immunized, I would have said, ‘Look, I’m not some sort of anti-vax flat-earther.

From Los Angeles Times ● Nov. 5, 2021

Social media reacted as if Wilson was a flat-earther who had kidnapped the Lindbergh baby*, and social media declared the Flyers NHL-dead due to last-century thinking.

From Washington Post ● Dec. 9, 2018

Before Logan Paul got onstage at a flat-earther conference to support a knuckleheaded conspiracy theory, he told the audience he was feeling grateful that day.

From The Verge ● Dec. 3, 2018

Will we find out he's shitty to women or a flat-earther or that the one person he feels bad for in all of this is Roseanne?

From Golf Digest ● Sep. 13, 2018

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