Definitions for "Diegesis"
A narrative or history; a recital or relation.
The fictional reality being portrayed by the game. A term from film and narrative theory borrowed by Nordic role-playing theory. It is discussed extensively in "Beyond Role and Play". This is essentially the same as the Forge term Shared Imaginary Space. References: As Larp Grows Up Beyond Role and Play
In a narrative film, the world of the film's story. The diegesis includes events that are presumed to have occurred and actions and spaces not shown onscreen. See also diegetic sound, nondiegetic insert, nondiegetic sound.