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[sahy-fahy] /ˈsaɪˈfaɪ/ Informal.
of or relating to science fiction:
a writer of sci-fi books.
Origin of sci-fi
1950-55; by shortening Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for sci-fi
  • The show borrows heavily from other sci-fi sources and the first episode was heavy on exposition.
  • The stuff that sci-fi used to be made of comes to reality.
  • There were a million places to write sci-fi in those years, publishers eager to have it, and readers eager to argue about it.
  • You've done the rounds on the sci-fi convention circuit lately.
  • It's a dream of mine to be the sci-fi weirdo in some crazy cult movie.
  • There's not a doubt in my mind that audiences across the spectrum will respond to the film's novel approach to sci-fi.
  • Not only is this an old idea, but there is a fairly well known sci-fi novel about it.
  • When a pre-theory equation and a philosophy combine, it may have a better home in sci-fi than in published scientific journals.
  • It occurred to me that other sci-fi and fantasy movies also require terse synopses for the channel-surfing community.
  • Think of the weirdest creatures you've even seen in a sci-fi film.
British Dictionary definitions for sci-fi


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
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Slang definitions & phrases for sci-fi



: sci-fi fans secretly crave


Science fiction (1955+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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Related Abbreviations for sci-fi


science fiction
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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