Post-existence refers to the state of being after death. Synonyms for this word might include phrases such as afterlife, hereafter, or beyond. Other synonyms might include terms like eternity, immortality, or the great beyond. Some people might also use phrases like the afterworld or the astral plane to refer to the state of being after death. Regardless of the specific term used, most people believe that some form of existence persists after death, whether that be in the form of a spirit or soul, in a specific religious realm, or in some other form that is not yet fully understood.