noun.a set of written sheets of skin or paper or tablets of wood or ivory

• an address book
• reading a good book

noun.a set of written, printed, or blank sheets bound together between a front and back cover

• reference books
• hardcover and paperback books

noun.a long written or printed literary composition

• the books of the Bible
• put his hand on the Book and took the oath

adjective.derived from books and not from practical experience

• book learning
• book assets

adjective.shown by ledgers

verb.to register (something, such as a name) for some future activity or condition (as to engage transportation or reserve lodgings)

• was booked to sail on Monday
• book the band for a week

verb.to schedule engagements for

• booking a strategy meeting
• book two seats at the theater

verb.to set aside time for

• tried to make reservations, but they were all booked up
• was booked on suspicion of murder