Definition of chapter book in US English:

chapter book

noun

  • 1A book containing records relating to an ecclesiastical chapter or (later) to a branch of a secular organization or society.

  • 2A children's book with text divided into chapters (opposed to picture book).

Origin

Early 18th century; earliest use found in Francis Atterbury (1663–1732), bishop of Rochester, politician, and Jacobite conspirator.