off-book adjective 2off book prepositional phrase 2 adjective2 •Able to perform scripted material from memory, without need to refer to the text. •Off the books, not officially recorded.An enormous amount of off-book money sloshes around Chinese business and officialdom, and some of it runs into handbags. — 2013 off book prepositional phrase2 •No longer needing the script to rehearse.After 5 days studying the script, Jane is now off book, and can concentrate on gesture more. •Ellipsis of off book value (“below book value”)."in the winter of 1957-58 prices were 60 percent off book." — 1963
