on the books prepositional phrase4 •Contained in an official list (of members, employees, clients, projects etc.).The research was carried out by studying the medical records of some 17m people on the books of GPs in England and the 5,683 covid-attributable deaths therein. — 2020 •Recorded or registered, especially in an official or definitive manner.The event was free, but there was a donation bowl for those who wanted to contribute and it was pretty packed with greenbacks. The first community soup event was on the books now. — 2010 •Officially recorded in the financial records of a company or organization.Promptly came the reply that there was no record on the books of father's owning any stock. — 1908 •Officially recorded in the lawbooks; having the force of enacted law.The ban on interracial marriages remained on the books for nearly a century after its passage. — 2004