Pronunciation: /prɪˈpɒstərəs/
adjective a term used to describe something that is absurd or ridiculous to a very unreasonable extent
A1 The idea of flying without an airplane seems preposterous to me.
A2 It is preposterous to think that aliens are living among us.
B1 The notion that the earth is flat is preposterous in this day and age.
B2 It is preposterous to believe that time travel is possible.
C1 Some people find it preposterous to think that humans could colonize Mars in the near future.
C2 The preposterous claims made by the conspiracy theorist were easily debunked by scientists.
formal The idea that aliens built the pyramids is preposterous and lacks any scientific evidence.
informal It's preposterous to think that I would lend you money after you never paid me back before.
slang That's just straight up preposterous, dude. No way that's true.
figurative The notion that she could finish the project in one day was preposterous, considering its complexity.
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is being preposterous
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