unreal

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

• “ghosts and other unreal entities”
• “unreal propaganda serving as news”

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”

contrived by art rather than nature

• “artificial flowers”
• “artificial flavoring”
• “an artificial diamond”
• “artificial fibers”
• “artificial sweeteners”

lacking material form or substance; unreal

• “as insubstantial as a dream”
• “an insubstantial mirage on the horizon”