chapter noun
1 part of a book
ADJ. introductory, opening
VERB + CHAPTER read I read the first few chapters and then got bored.
PREP. in a/the ~ His influence on other writers will be discussed in the next chapter. | ~ about/on a chapter on the city's architecture
2 particular period
ADJ. difficult, sad, unhappy Her return to France ended a particularly unhappy chapter in her life.
You can also check other dicts: chapter (English, 中文解释 ), wordnet sense, Collins Definition