A surname.

(idiomatic) Finished; concluded; able to be regarded as a matter of record.

Contained in an official list (of members, employees, clients, projects etc.). / (business, accounting) Officially recorded in the financial records of a company or organization.

present participle of book it

Third-person singular simple present indicative form of book it

plural of by-book

The qualities that make a book what it is.

(theater) Acting as prompter.

plural of Book

(idiomatic) Of a single resource, reserved for two different users at the same time.