combines elements of Science Fiction and Fantasy or covers all forms of beyond reality fiction.

fiction which combines elements of Fantasy and Science Fiction or covers all forms of beyond reality fiction.

Fiction that extrapolates from some phenomenon or theory and postulates 'what if?'

Another name for the supergenre of Fantastic Fiction and/or the genre of Science Fiction.

Speculative fiction is a term which has been used in multiple related but distinct ways. Speculation fiction is a type of fiction that asks the classic "What if?" question and attempts to answer it.