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