The short answer is that IDF stands for Israeli Defense Force.
The long answer is the IDF much more than an army. Almost every Israeli citizen becomes a member of the Israeli defense Forces. The IDF is Israel’s army, but it is much, much more than an army.
What does the IDF mean to Israeli society?
David Ben-Gurion and Moshe Dayan had this to say about what the IDF means to Israel. It is in this spirit that Shaving Israel was created.
"The IDF should also be the center for Zionist education for Israel's youth, children and immigrants..."
"Our soldiers prevail not by the strength of their weapons but by their sense of mission; by their consciousness of the justness of their cause, by a deep love for their country, and by their understanding of the heavy task laid upon them: to ensure the existence of our people in their homeland and to affirm, even at the cost of their lives, the right of the Jewish people to live their lives in their own state, free, independent and in peace."