n.

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
   • the divorce was an ugly chapter in their relationship
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