Definitions for: Fantastical

[adj] ludicrously odd; "Hamlet's assumed antic disposition"; "fantastic Halloween costumes"; "a grotesque reflection in the mirror"
[adj] existing in fancy only; "fantastic figures with bulbous heads the circumference of a bushel"- Nathaniel Hawthorne

Webster (1913) Definition: Fan*tas"tic*al, a.
Fanciful; unreal; whimsical; capricious; fantastic.

Synonyms: antic, fantastic, grotesque, strange, unreal, unusual