Solidly and thoroughly booked; fully scheduled with no free breaks or space; unavailable.

(US, UK, slang, vulgar) An illustrated pornographic book; a pornographic magazine.

plural of book lover

A person who loves reading books.

The Biblical book of the Acts of the Apostles.

(US, law) A lawyer's collection of clients.

A book of statistics or almanac, usually published by an agency or as a trade publication. / Used other than figuratively or idiomatically: see blue, book.

(horseracing) To lay bets (recorded in a pocketbook) against the success of every horse, so that the bookmaker wins on all the unsuccessful horses and loses only on the winning horse or horses.

(transitive, idiomatic, informal) To charge with or convict of as many crimes as possible. / (transitive, idiomatic, informal) To apply the harshest possible punishment to.

(theater) Able to perform scripted material from memory, without need to refer to the text. / (accounting) Off the books, not officially recorded.