Fantastic
Part of speech: adjective
Definition: Existing in or constructed from fantasy; of or related to fantasy; fanciful. Not believable; implausible; seemingly only possible in fantasy. Wonderful; marvelous; excellent; extraordinarily good or great (used especially as an intensifier).
Fantasy
Part of speech: noun
Definition: That which comes from one's imaginationThe literary genre generally dealing with themes of magic and fictive medieval technology.The drug gamma-hydroxybutyric acid.
Example sentence: Fantasy, abandoned by reason, produces impossible monsters; united with it, she is the mother of the arts and the origin of marvels.