What's the difference between deuteronomy and pentateuch?

Deuteronomy

Definition:

(n.) The fifth book of the Pentateuch, containing the second giving of the law by Moses.

Example Sentences:

(1) And you think of the teenage years, of defiance for defiance’s sake, of assertive mockery and the contempt of selective deafness, of constant jockeying for power in a relationship suddenly destabilized – of this fathers-and-sons thing that stretches back 152 years to Turgenev and a further 2,500 years to Exodus, Leviticus and Deuteronomy.
(2) Indeed, orthodox rabbis are still compelled to believe that Moses himself wrote the Books of Moses, including Deuteronomy 34:5: “And Moses the servant of the Lord died there in Moab, as the Lord had said.
(3) In Deuteronomy 21:11–14, marriage is made by selecting a beautiful woman from among the spoils of war, shaving her head and paring her nails.
(4) Deuteronomy 23 instructs Jews to excrete outside camp and to carry a spade to bury the result.
(5) Deuteronomy institutes another involuntary form of marriage.
(6) There have been Buddhist monks in orange robes, Muslims in purple tunics, evangelical Christians with megaphones quoting Deuteronomy, and Socialist Worker Party activists advocating capitalism’s overthrow.
(7) Deuteronomy, the Greeks and Shakespeare all tell us this.

Definition:

(n.) The first five books of the Old Testament, collectively; -- called also the Law of Moses, Book of the Law of Moses, etc.

Example Sentences:

(1) It was perfectly fine – indeed strongly encouraged throughout the Pentateuch – to kill Canaanites, Midianites, Jebusites, Hivites etc, especially if they had the misfortune to live in the Promised Lebensraum.