Meaning of “fiction” - Learner’s Dictionary

fiction

noun uk us /ˈfɪkʃən/
STORIES [ U ]

B1 literature and stories about imaginary people or events:

What's the best-selling children's fiction title?
→ Opposite nonfiction
NOT TRUE [ U, no plural ]

something that is not true or real:

Nobody knows whether his statement is fact or fiction.
→ See also science fiction

(Definition of “fiction” from the Cambridge Learner’s Dictionary © Cambridge University Press)