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a prefix occurring orig. in loanwords from Greek, with the meanings “through, across, from point to point” (diachronic; diameter; diarrhea), “in different directions, apart, at an angle” (dialysis; diastole ), “completeness or thoroughness (of the action of the verb)” (diagnosis).Also, esp. before a vowel, di-.
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|Noun||1.||DIA - an intelligence agency of the United States in the Department of Defense; is responsible for providing intelligence in support of military planning and operations and weapons acquisition|
Defense Department, Department of Defense, DoD, United States Department of Defense, Defense - the federal department responsible for safeguarding national security of the United States; created in 1947
armed forces, armed services, military, military machine, war machine - the military forces of a nation; "their military is the largest in the region"; "the military machine is the same one we faced in 1991 but now it is weaker"
military intelligence, military intelligence agency - an agency of the armed forces that obtains and analyzes and uses information of strategic or tactical military value
United States intelligence agency - an intelligence service in the United States