chapter

a subdivision of a written work; usually numbered and titled; "he read a chapter every night before falling asleep"

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"

a local branch of some fraternity or association; "he joined the Atlanta chapter"

an ecclesiastical assembly of the monks in a monastery or even of the canons of a church

a series of related events forming an episode; "a chapter of disasters"