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English definition of “science fiction”

science fiction

noun [U]  /ˈsɑɪ·əns ˈfɪk·ʃən/ (short form sci-fi,  /ˈsɑɪˈfɑɪ/) us  
a type of writing about imagined developments in science and their effect on life esp. in the future
(Definition of science fiction from the Cambridge Academic Content Dictionary © Cambridge University Press)
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