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Synonyms

sci-fi

American  
[sahy-fahy] / ˈsaɪˌfaɪ /
Also scifi,

adjective

  1. of or relating to science fiction.

    a writer of sci-fi books.


sci-fi British  
/ ˈsaɪˌfaɪ /

noun

  1. short for science fiction

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of sci-fi

First recorded in 1950–55; by shortening

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Muldoon starred in Paul Verhoeven's sci-fi action film Starship Troopers in 1997, playing Zander Barcalow, the romantic rival of the lead character, portrayed by Casper Van Dien.

From BBC • Apr. 20, 2026

In a totalitarian sci-fi world, a hammer thrown by a young athlete smashes a "Big Brother" figure declaiming to brainwashed citizens from a vast screen.

From Barron's • Mar. 29, 2026

Spielberg’s film, released the year before “Testament,” is a sci-fi fantasy of suburban youth in a universe of expanding possibility—an inverse image of the considerably darker, not-so-improbable science fiction in which Scottie finds himself.

From The Wall Street Journal • Mar. 26, 2026

One of them, XPrize & Singularity University founder and chair Peter H. Diamandis, just launched a $3.5 million fund to promote optimistic sci-fi films to counter the AI doomsday narrative.

From Salon • Mar. 26, 2026

I have a bookcase filled with all kinds of stories: mysteries, fantasy adventures, sci-fi.

From "The Sea in Winter" by Christine Day