Definitions of unreal:

• adjective:   lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria

  Example: "Ghosts and other unreal entities"

• adjective:   not actually such; being or seeming fanciful or imaginary

  Example: "This conversation is getting more and more unreal"

• adjective:   contrived by art rather than nature
• adjective:   lacking material form or substance; unreal