Meta-fiction is the correct answer
Antediluvian is an adjective and has two meanings:
1) of or belonging to the time before the Biblical flood
2) Ridiculously old fashioned or greatly out of date (sometimes used in a humorous sense)
Here, I'll use it in a sentence:
I often feel my mother wears clothes that are so antediluvian, she never has to worry about blending in with the crowds.
<span>As soon as the latest iPhone came out, the older models became antediluvian to tech experts.
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Hope this helped! :)
