On Ceasing to Exist?

Eternal oblivion (also referred to as non-existence or nothingness) is the philosophical or religious concept of one's consciousness forever ceasing upon death. This concept is mostly associated with religious skepticism, secular humanism and atheism. ... When brain death occurs, all brain function forever ceases.

What does ceasing to exist mean?

: to cause to come to an end especially gradually : no longer continue they were forced to cease operations cease to exist.

What is a word for cease to exist?

drown. expire. perish. succumb.