Derived from the Greek word “epiphaneia”, epiphany is that moment in a story where a character achieves awareness, consciousness or a feeling of knowledge after which happenings are seen through the prism of a new light in the story. A sudden realization about the nature or meaning of something can be an epiphany.
The purpose of epiphany in a short story or novel is to highlight a turning point in the plot in the near future. Epiphany is used to describe scientific revolution, religious, logical or philosophical discoveries it may be a sign of a conclusion in the story. Writers use them to show the progress of a character or provide validation for a major plot transferal.