Fantasy is the opposite of reality. Fantasy can be categorize in many ways. One way is by literature as a genre. Another is someone’s imagination and dreamscape. Fantasy can be used in multiple ways with various meaning.
In literature and entertainment, a genre of fiction in which entirely different laws of physics and/or psychics operate, allowing people, creatures, and their surroundings to exhibit behavior not possible in reality.
for instance, fantasy tends to revolve around battles between 'good' and 'evil', whereas science fiction often applies a more relativistic form of morality, or none at all. and robots.