noun
That which comes from one's imagination.
(literature) The literary genre generally dealing with themes of magic and the supernatural, imaginary worlds and creatures, etc.
A fantastical design.
(slang) The drug gamma-hydroxybutyric acid.
verb
To conceive (something) mentally; to imagine.
To fantasize about something).
To conceive mentally; to imagine.
To have a fancy for; to be pleased with; to like.