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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-.
[< Greek, comb. form representing diá (preposition) through, across, akin to dýo two and di- di-1]


ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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
IC, Intelligence Community, National Intelligence Community, United States Intelligence Community - a group of government agencies and organizations that carry out intelligence activities for the United States government; headed by the Director of Central Intelligence
References in periodicals archive ?
Like most financial products, a DIA is not a "one-size-fits-all" transaction.
Martin's duties as Associate Executive Director will include managing the DIA worldwide marketing, training and information technology activities in collaboration with the DIA offices in Basel, Switzerland, Tokyo, Japan and Horsham, PA.
DIA services, retail/enterprise and wholesale DIA/high-speed IP transit services markets?
Ling Su, DIA President-elect, Novartis Pharmaceuticals, China
In DIA, you see a side of kids you don't see in class,'' said Kornfeld, who has since transferred to West Ranch High, where she has started another DIA club.