Dictionary

Initialism of bad kid, an inexperienced player or noob.

A collection of sheets of paper bound together to hinge at one edge, containing printed or written material, pictures, etc.

Example: He was frustrated because he couldn't find anything about dinosaurs in the book.

A long work fit for publication, typically prose, such as a novel or textbook, and typically published as such a bound collection of sheets, but now sometimes electronically as an e-book.

Example: I have three copies of his first book.

A major division of a long work.

Example: Genesis is the first book of the Bible.

A record of betting (from the use of a notebook to record what each person has bet).

Example: I'm running a book on who is going to win the race.