Definition of metafiction noun from the Oxford Advanced American Dictionary

 

metafiction

 noun
noun
NAmE//ˈmɛt̮əˌfɪkʃn//
 
[uncountable]
 
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a type of play, novel, etc. in which the author deliberately reminds the audience, reader, etc. that it is fiction and not real life
See the Oxford Advanced Learner's Dictionary entry: metafiction