cyberspace
     n : a computer network consisting of a worldwide network of
         computer networks that use the TCP/IP network protocols
         to facilitate data transmission and exchange [syn: {Internet},
          {Net}]
Source: WordNet® 2.0

cyberspace /si:'br-spays`/ n. 1. Notional `information-space' loaded
   with visual cues and navigable with brain-computer interfaces called
   `cyberspace decks'; a characteristic prop of {cyberpunk} SF. Serious
   efforts to construct {virtual reality} interfaces modeled explicitly on
   Gibsonian cyberspace are under way, using more conventional devices such
   as glove sensors and binocular TV headsets. Few hackers are prepared to
   deny outright the possibility of a cyberspace someday evolving out of
   the network (see {the network}). 2. The Internet or {Matrix} (sense #2)
   as a whole, considered as a crude cyberspace (sense 1). Although this
   usage became widely popular in the mainstream press during 1994 when the
   Internet exploded into public awareness, it is strongly deprecated among
   hackers because the Internet does not meet the high, SF-inspired
   standards they have for true cyberspace technology. Thus, this use of
   the term usually tags a {wannabee} or outsider. Oppose {meatspace}. 3.
   Occasionally, the metaphoric location of the mind of a person in {hack
   mode}. Some hackers report experiencing strong eidetic imagery when in
   hack mode; interestingly, independent reports from multiple sources
   suggest that there are common features to the experience. In particular,
   the dominant colors of this subjective `cyberspace' are often gray and
   silver, and the imagery often involves constellations of marching dots,
   elaborate shifting patterns of lines and angles, or moire patterns.


Source: The Jargon File