The Collaborative International Dictionary of English v.0.48:

DoD \DoD\, DOD \DOD\(d[o^]d or d[=e]"[=o]*d[=e]`), prop. n.
   [from Department of Defense.]
   the United States Department of Defense, the federal
   department responsible for safeguarding national security;
   created in 1947. It includes within its jurisdiction control
   of the Army, Navy, Air Force, and Marines. [acronym]

   Syn: Department of Defense, Defense Department, Defense.
        [WordNet 1.5 +PJC] Dodd

The Collaborative International Dictionary of English v.0.48:

Dodd \Dodd\, Dod \Dod\, v. t. [OE. dodden.]
   To cut off, as wool from sheep's tails; to lop or clip off.
   --Halliwell.
   [1913 Webster]

WordNet (r) 3.0 (2006):

DoD
    n 1: the federal department responsible for safeguarding
         national security of the United States; created in 1947
         [syn: Department of Defense, Defense Department,
         United States Department of Defense, Defense, DoD]

The Free On-line Dictionary of Computing (30 December 2018):

DoD

   1.  Department of Defense.

   2. Dial on Demand.

   (2000-03-25)