Top Definition
Acronym for full-immersion virtual reality or fully immersive virtual reality. It is the VR you see in movies like The Matrix, where it is nearly indistinguishable from reality.

Pronounced fee-ver or fy-ver.
PresentGirl2009: The Sims 3! Awesome!
FutureDude2034: 3D game on a 2D display? Just wait till FIVR comes along.
by Nasika June 04, 2009
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