In the musical Bye Bye Birdie, the Elvis-like title character performs his fictional hit song "Honestly Sincere," making all the girls swoon. WHAT ADJECTIVE, originating with Greek storytelling traditions and in contrast to mimetic, is used in theater to describe such a song or dance, which occurs as a performance within the events of the story? This term is also used in film for music that is audible to characters onscreen, rather than background underscoring.
DIEGETIC