Does Nirvana really means stopping of birth and death? Does it ensures that no new one will arise again?
Nirvana/Kensho/Satori is only a &quot;goal&quot; as long as you haven't experienced it. The experience conveys the one-ness, emptiness and interconnectivity of all phenomena. In some Buddhist schools, this is referred to as &quot;the Great Death&quot;, as this reveals the &quot;I&quot; as an illusion.
But from that point onward, attainment has been achieved and is no longer the &quot;driving goal&quot; of practice. In Zen, for example, this is illustrated in a sequence of drawings called the &quot;Oxherding Pictures&quot;. The first nine pictures illustrate the stages toward attainment. The tenth however, shows the practitioner:


10. Return to Society Barefooted and naked of breast, I mingle with the people of the world. My clothes are ragged and dust-laden, and I
am ever blissful. I use no magic to extend my life; Now, before me,
the dead trees become alive

A good book about life after attainment is Jack Kornfield's &quot;After the Ecstasy, the Laundry&quot;.
As to whether attainment stops the cycle of birth and death, the answer depends on what you ask is being born and dying. If you ask for the &quot;I&quot;, then attainment will show this &quot;I&quot; to be an illusion. If you ask it for the emptiness of all phenomena, the most honest answer is &quot;we do not know&quot;. &quot;I&quot;