1. The instructions, user or technical manual for a piece of equipment.

2. By inference, any important piece of documentation, either as treeware or in electronic form.

"Where's the Book of Words for the router ?"

"I've logged the fault in the Book of Words."
by Eighth of Seven January 14, 2007
Get the book of words mug.
A word that is never spoken but is seen in books all the time: Indiscriminate, chortle, begrudgingly, facade...
Judy: I begrudgingly drove my sister to school this morning.
Beth: Begrudgingly? that is such a book word! no one actually says that word aloud!
by HanPik1 February 4, 2010
Get the Book Word mug.