IPA: /ˈtʃæp.tər/
KK: /ˈtʃæptər/
A section of a book or document that is usually numbered or titled, helping to organize the content into parts.
I just finished reading the first chapter of the novel.
Chapter → It is derived from the Latin word "capitulum" (meaning a small head or division), which is a diminutive form of "caput" (meaning head). The word refers to a division or section of a written work, akin to a 'head' of a text.
Think of a 'head' ('caput') that represents a section of a book — that's why a chapter is a division of a written work.