fantastic -
extraordinarily good or great ; used especially as intensifiers; "a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"
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"
fantastic -
fanciful and unrealistic; foolish; "a fantastic idea of his own importance"
fantastic -
Wonderful; marvelous; excellent; extraordinarily good or great used especially as an intensifier.
Wikipedia
The Fantastic is a literary term that, in some cases, is used as a genre in and of itself, although in this case it is often conflated with the Supernatural. The term was originated in the structuralist theory of critic Tzvetan Todorov in his work The Fantastic. He describes the fantastic as being the hesitation of characters and readers when presented with questions about reality.
OmegaWiki Dictionary
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fantastic Causing wonder, admiration or astonishment.