"Ragnarök" is a mythological event in Norse beliefs representing the end of the world and the final battle between gods and giants. It encompasses a series of catastrophic events, including natural disasters and the death of major deities like Odin and Thor. This destruction gives rise to a rebirth of the world, symbolizing cyclical renewal. Ragnarök embodies the themes of fate, the inevitability of change, and the complex relationship between creation and destruction within the cosmos.