That which comes from one's imagination.
A fantastical design.
The drug gamma-hydroxybutyric acid.
The literary genre generally dealing with themes of magic and the supernatural, imaginary worlds and creatures, etc.
To imagine; to conceive mentally.
To fantasize (about).
A misapprehension; a belief in something that is in fact not true.
Anything that seems to be something that it is not.
A magician’s trick.
The state of being deceived or misled.