Formal, often literary or news term for the end of a person's life, or metaphorically for the end of an era or institution. Used as a noun or with する to mean 'to die' or 'to come to an end'.
noun, noun or participle which takes 'suru', intransitive verb
spending one's final years peacefully
Focuses on the manner of living out one's last days, often with a nuance of tranquility or fulfillment. Less common than sense 1; typically used in phrases like 終焉の地 (place of one's final years).