flat-earther
noun
flat-earth·er
ˌflat-ˈər-thər 
variants
or less commonly flat-earthist
: a person who believes that the planet Earth is flat
Examples of flat-earther in a Sentence
Recent Examples on the Web
In general, most flat-earthers believe Earth is a flat, hockey-puck-like object covered by a dome, sometimes called a firmament, with walls of ice around the edges of the dome.
—
Terry Collins, USA Today, 8 Apr. 2024
Google denied that there was any evidence that LaMDA was sentient, and experts agreed, in a tone that made those who would say otherwise seem like flat-earthers.
—Josh Morgenthau, Washington Post, 5 Aug. 2023
Modern flat-earthers came out of the mid to late nineteenth century with the explosion of the Industrial Revolution.
—Justin E. H. Smith, Harper's Magazine, 21 Aug. 2022
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Terry Collins, USA Today, 8 Apr. 2024
Google denied that there was any evidence that LaMDA was sentient, and experts agreed, in a tone that made those who would say otherwise seem like flat-earthers.
—Josh Morgenthau, Washington Post, 5 Aug. 2023
Modern flat-earthers came out of the mid to late nineteenth century with the explosion of the Industrial Revolution.
—Justin E. H. Smith, Harper's Magazine, 21 Aug. 2022
Cite this Entry
“Flat-earther.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/flat-earther. Accessed 4 Nov. 2025.
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