English

Alternative forms

• flat earther

Noun

flat-earther ‎(plural flat-earthers)

1. A person who believes or advocates the theory that the planet Earth is flat.
2. (idiomatic, by extension) A person who believes or advocates an outlandish, discredited theory; a person who refuses to acknowledge the truth despite overwhelming evidence.
   • 2008, Bob Sweere, "Voice of the Day: Global warming? Yes," News-Leader.com (Missouri), 16 Jun. (retrieved 1 July 2008),

     Global warming is settled, unless you are a flat earther or an energy company apologist.

Synonyms

• platygaean, platygaeanist

References

• "flat-earther" at OneLook® Dictionary Search.
• Random House Webster's Unabridged Electronic Dictionary, 1987-1996.