Adjective
Of or relating to diegesis.
(film music) Occurring as part of the action (rather than as background), and able to be heard by the film's characters.
Source: en.wiktionary.orgLester's fixation on Angela is reflected in a discordant, percussive musical motif that temporarily replaces the diegetic "On Broadway". Source: Internet
The changes may occur to accommodate sequels or derivative works, allowing newer authors or creators to revise the diegetic (in-story) history to include a course of events that would not have been possible in the story's original continuity. Source: Internet
That whole bit about 's songs being better because they're diegetic and therefore reflect the choices of the characters drove me nuts. Source: Internet
Voices were warm and full, with dialog brimming with realism, easily parsed from music and diegetic effects. Source: Internet