chapter (of a book, document, or other written work)
J'ai lu le premier chapitre de son nouveau roman hier soir.
I read the first chapter of his new novel last night.
a stage, period, or phase in someone's life or in a sequence of events
Il est temps de tourner la page et de commencer un nouveau chapitre de ma vie.
It's time to turn the page and start a new chapter in my life.