What is isekai definition?

Isekai is a Japanese genre of light novels, manga, and anime where the protagonist gets transported to a parallel world or a different universe. The word "isekai" in Japanese means "another world." In an isekai story, the protagonist is usually an ordinary person who suddenly gets transported to a fantasy world where they possess unique abilities or powers, such as magic or fighting skills. In this world, they often embark on a journey or an adventure, encounter mythical creatures, and befriend or fight against other characters. Isekai stories can also include themes such as politics, kingdom-building, and romance. The genre has gained increasing popularity in recent years in Japanese media and has been adapted in various forms of entertainment, including video games and web series.