What does CHAPTER mean?

noun

1. a subdivision of a written work; usually numbered and titled“he read a chapter every night before falling asleep”
2. any distinct period in history or in a person's life“the industrial revolution opened a new chapter in British history”
3. a local branch of some fraternity or association“he joined the Atlanta chapter”
4. an ecclesiastical assembly of the monks in a monastery or even of the canons of a church
5. a series of related events forming an episode“a chapter of disasters”