book of Bible: a book of the Bible that repeats the Ten Commandments and records much of Mosaic Law. It is the fifth book of the Pentateuch. (MSN Encarta)
the fifth book of canonical Jewish and Christian Scripture containing narrative and Mosaic laws (Merriam-Webster)
the fifth book of the Pentateuch, containing a second statement of the Mosaic law. Abbreviation: Deut. (Dictionary dot Com)