extradiegetic - Currently no debate

General definition:

Outside the world of the story (the diegesis)

Associated practices:
narrative environment design - Narratology

extradiegetic in narrative environment design

This is commonly the position of the narrator (third person, sometimes omniscient, narrators, for example the typical curatorial voice in museums and galleries).

it is typically the position of the narratee. However, please note that often, in narrative environments, the narratee will be physically inside the elements that constitute the diegesis while remaining mentally and psychologically outside the story.

Broader terms:
The diegesis
Narrower terms:
Metalepsis
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extradiegetic in Narratology

The diegesis is the world of the narrative. It includes objects, events,  spaces and the characters that inhabit them, including things, actions,  and attitudes not explicitly presented in the work but inferred by the audience. That audience constructs a diegetic world from the material presented in a narrative.

Broader terms:
The diegesis
Narrower terms:
Metalepsis
No content