from wikipedia...
"RoboCop is a 1987 American science fiction action film directed by Paul Verhoeven"
my 2¢...
When it comes to these definitions, I see it as Sci-Fi being the subject matter and Action being the tone. There is satire in Robocop, but it isn't 'funny'. It's more cynical commentary.
Fiction, Sci-Fi, Fantasy, Historical, comic book = Subject matter
Action, comedy, thriller, drama, horror = Tone
It gets murky though because you can have action comedies like Lethal Weapon, although that could be a thriller action comedy? What is a genre?