chapter (chapters plural )
1 n-count A chapter is one of the parts that a book is divided into. Each chapter has a number, and sometimes a title.
Chromium supplements were used successfully in the treatment of diabetes (see Chapter 4)...
2 n-count A chapter in someone's life or in history is a period of time during which a major event or series of related events takes place.
WRITTEN This had been a particularly difficult chapter in Lebanon's recent history.
chapter house (chapter houses plural )
1 n-count A chapter house is the building or set of rooms in the grounds of a cathedral where the members of the clergy hold their meetings.
2 n-count In a university or college, a chapter house is the place where a fraternity or sorority lives or meets.
(AM)
social chapter
The social chapter is an agreement between countries in the European Union concerning workers' rights and working conditions. n-sing