A "film adaptation" refers to a movie that has been made based on a book, play, or another source material. It means taking a story from one form (like a book) and recreating it into a film format. Full definition
English language arts teachers have long had an established practice of using film adaptations of the literary works their students read. (citejournal.org)
But that doesn't mean that a feature film adaptation of the 1973 bank robbery that originated the term can't be outright hilarious. (slashfilm.com)
Not quite a remake of the first game, the latest adventure for the titular duo was actually built as a tie - in for an upcoming film adaptation. (warpzoned.com)