Fiction; a fabrication or made-up story — something invented or imaginary rather than factual.
その小説は歴史を題材にした虚構だが、登場人物は魅力的だ。
That novel is a fictional work based on history, but its characters are compelling.
報道と虚構を見分けるのは時に難しい。
Sometimes it's difficult to distinguish between news reporting and fiction.
映画は完全な虚構だと割り切って楽しんだ。
I enjoyed the movie by accepting it as complete fiction.