There are 5 phenomenological notion of death according to Martin Heidegger.

The world is governed by time.

Following the society would not mean good existence

The death of one's person belongs to him

Death removes all relation to others

There can be proxies and substitute for a person in experiencing death.

Humans can be immortal.

Death can be taken away from the person.

Humans are finite beings according to Martin Heidegger.