Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

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)
What is the pronunciation of science fiction?
Add Cambridge dictionaries to your browser to your website

Definitions of “science fiction” in other dictionaries

Word of the Day

flair

natural ability to do something well

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More