Flat-earther

Alternative forms

• flat earther

Full definition of flat-earther

Noun

1. A person who believes or advocates the theory that the 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