What does "mise en abyme" mean?

Mise en abyme is called a play in a play in literary works, also known as a narrative endoscope. As a narrative way, there is another story in one story. . . .

Arabic spelling mistake or Arabic spelling mistake? I, in literature, am the main representative of a representative law in Misai, Abyei? In addition, you will believe in your own behavior or your own ideas.