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flat earther

flat earther

3 9.9
A person who believes the Earth is flat
  • noun
  • /flæt ˈɜrθər/
  • Informal
: terraplanista
  • Many flat earthers believe that the Earth's shape is part of a larger conspiracy.

How do you handle a flat earther?

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Examples

  • Did you know that there are flat earthers out there?

    Blog text (8)
  • Have you ever seen a genuine Flat Earther even on the internet?

    Blog text (10)
  • And Alaska is the home of one of the major 'Flat Earthers'—remember her?

    Blog text (25)
  • None of the folks mentioned above are flat earthers, a designation more descriptive of the alarmist crowd.

    Blog text (32)
  • When skeptics made essentially these very same statements just a few months ago, they were either censored or patronizingly put down as denialists and flat earthers.

    Blog text (20)
  • In discussions about science, some people are surprised to learn that flat earthers exist.

  • Flat earthers often gather online to share their beliefs about the shape of the Earth.

Synonyms

conspiracy theorist
vsflat earther
24 6.6

A person who thinks powerful people secretly plan important events

is used specifically for people denying the planet's accepted shape
Earther
vsflat earther
  • Slang
3 9.9

A person who believes the Earth is flat

is a label that highlights conspiracy belief and criticism
conspiracist
vsflat earther
2 8.8

A person who believes hidden groups control events and tells others

is narrower, naming belief about the planet's shape
flat-earther
vsflat earther
1 9.0

A person who believes the Earth is flat

has identical meaning but is written without a hyphen
truther
vsflat earther
  • Slang
1 9.2

Relating to people who believe or spread ideas that official stories about events are false

is the specific term for the planetary shape conspiracy belief
conspiracy fuzznut
vsflat earther
  • Offensive
9.9

A person who believes secret groups control events without proof

is a neutral descriptive term without mocking tone

Surface Forms

flat earther singular
flat earthers plural

Morphology

flat + Earther

The meaning is directly compositional: 'flat' (having a plane surface) combined with the person-forming element (‑er) referring to the Earth yields 'a person who believes the Earth is flat'. This adjective + person pattern is transparent and cross-linguistically common, so a B1 learner who knows the constituents would readily infer the intended meaning.

Etymology

Flat earther comes from the clear image of the world as a flat plate or pancake, and earther simply means a person connected to the Earth. So today flat earther means 'a person who believes the Earth is flat', often used for people who share that idea in groups or online.