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Central Intelligence Agency.
colloquial (originally and chiefly U.S.). With the. Chiefly with capital initial. The Central Intelligence Agency, the CIA. Cf. agency, n. 3.
U.S. colloquial. With the. Usually with capital initial. The Central Intelligence Agency, the CIA. Cf. company, n. 5e, bureau, n. 2d.
British slang. In plural, usually with the and capital initial. In espionage: (a nickname for) the Central Intelligence Agency, the CIA.