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Meaning of alien space bats | Babel Free

Noun CEFR C1

Definitions

An implausible point of divergence from reality, used as a plot device in alternate history.

plural, plural-only, slang

CEFR level

C1

Advanced
This word is part of the CEFR C1 vocabulary — advanced level.

See also

alien species Alienability Alienable alienableness Alienably alienage