[adj] lacking material form or substance; unreal; "as insubstantial as a dream"; "an insubstantial mirage on the horizon"
[adj] contrived by art rather than nature; "artificial flowers"; "artificial flavoring"; "an artificial diamond"; "artificial fibers"; "artificial sweeteners"
[adj] lacking in reality or substance or genuineness; not corresponding to acknowledged facts or criteria; "ghosts and other unreal entities"; "unreal propaganda serving as news"
[adj] 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"
aerial, aeriform, aery, airy, arranged, artificial, bleached, cardboard, celluloid, colored, coloured, conventionalised, conventionalized, deceptive, delusory, dreamed(a), dreamlike, dummy, dyed, envisioned, ersatz, ethereal, eye-deceiving, fabled, fabric
\Un*re"al\, a. Not real; unsubstantial; fanciful; ideal.