1.Definition: contrived by art rather than nature
2.Definition: lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria
"Ghosts and other unreal entities", "Unreal propaganda serving as news"
3.Definition: lacking material form or substance; unreal
4.Definition: not actually such; being or seeming fanciful or imaginary
"This conversation is getting more and more unreal", "The fantastically unreal world of government bureaucracy", "The unreal world of advertising art"