DoD DoD /ˈdoʊˈdiː/

noun

1. The federal department responsible for safeguarding national security of the United States; created in 1947  ( Defense Department [American] , DoD , United States Department of Defense , Defense [American] , Department of Defense )
   the federal department responsible for safeguarding national security of the United States; created in 1947
     The Department of Defense is responsible for national security.
   The Department of Defense is responsible for national security.