U.S. Department of Defense
(redirected from US DOD)Also found in: Dictionary, Thesaurus, Encyclopedia.
U.S. Department of Defense
A department in the United States charged with supervising the military and conducting war. It oversees military training and education and advises the president on military policy. It was established in 1947, but traces its origins to the Department of War and the Department of the Navy, both created in the late 1700s.