Parinirvana is a term in Buddhism that refers to the final state of nirvana achieved by a person who has attained enlightenment and has passed away. It signifies the complete liberation from the cycle of birth, death, and rebirth, known as samsara. In this state, all attachments and desires are extinguished, leading to ultimate peace and freedom. The concept of Parinirvana is particularly associated with the death of Siddhartha Gautama, the historical Buddha. After his passing, it is believed that he entered Parinirvana, marking the end of his physical existence and the culmination of his spiritual journey. This event is commemorated by Buddhists around the world.