The term nirvana is associated with both Hinduism, the oldest religion in the world, and Buddhism, its best known off-shoot.
Theravada Buddhism recognizes two kinds of nirvana or nibbana in Pali. Buddhism, then, is not so much a belief system as it is a practice that enables us to stop struggling. When you achieve nirvana, you stop accumulating bad karma because you've transcended it.
These are passion, aversion hatredand ignorance delusion. Some Mahayana sutras emphasize that enlightenment is the fundamental nature of all beings. The word Nirvana comes from the root meaning 'to blow out' and refers to the extinguishing of the fires of greed, hatred and delusion.
However, Mahayana also teaches that nirvana is not separate from samsarathe wheel of birth and death.