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flat earther

flat earther

1 9.9
A person who believes the Earth is flat
  • noun
  • /flæt ˈɜrθər/
  • Informal
translation icon : 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
19 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
5 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
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.