Dictionary.com
definitions

cyber-

  1. a combining form meaning “computer,” “computer network,” or “virtual reality,” used in the formation of compound words (cybertalk; cyberart; cyberspace) and by extension meaning “expressing visions of the future” (cyberfashion).

Origin of cyber-

extracted from cybernetics
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cyber-

cyber-

combining form
  1. indicating computerscyberphobia

Word Origin for cyber-

C20: back formation from cybernetics
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
cyber- in Science

cyber-

  1. A prefix that means “computer” or “computer network,” as in cyberspace, the electronic medium in which online communication takes place.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.