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1.
A slang term for the internet.
Hey, I'm surfing in cyberspace.
by Celestasia May 08, 2005
 
2.
"A consensual hallucination experienced daily by billions of legitimate operators, in every nation, by children being taught mathematical concepts. … A graphic representation of data abstracted from banks of every computer in the human system. Unthinkable complexity. Lines of light ranged in the nonspace(sic) of the mind, clusters and constellations of data. Like city lights, receding."
The word cyberspace was coined by William Gibson in the novelette Burning Chrome, but was more notably popularized by the above quote from page 69 of his latter publication, Neuromancer in 1984.
by Prawnshu August 18, 2010
 
3.
not noticing something or being surprized
this guy came out of cyber space and is all up in our conversation
by MR. 99 go dumness November 08, 2007
 
4.
A progressing virtual world of global computers having networks of interdependent information technology infrastructures, telecommunications networks and computer processing systems in which online interactions takes place.
Cyberspace is a progressing virtual world of global computers having networks.
by s j tubrazy April 19, 2013
 
5.
when one gets so high they feel as though they've slipped into another realm; when one gets way too high while alone to the point one can barely move.
Man, I smoked like four bowls last night by myself. I totally went into cyberspace.
by cmt440 June 05, 2010
 
6.
(verb) - to forget about another task because one is on the internet.
"Dude, you're burning the pancakes!" "Sorry, I cyberspaced it."
by CAMetgirl February 05, 2010