Wordnet 3.0
NOUN (1)
1. 
 an independent agency of the United States government responsible for collecting and coordinating intelligence and counterintelligence activities abroad in the national interest; 
 headed by the Director of Central Intelligence under the supervision of the President and National Security Council; 
[syn: Central Intelligence Agency, CIA]
WordNet (r) 3.0 (2006):
Central Intelligence Agency
    n 1: an independent agency of the United States government
         responsible for collecting and coordinating intelligence
         and counterintelligence activities abroad in the national
         interest; headed by the Director of Central Intelligence
         under the supervision of the President and National
         Security Council [syn: Central Intelligence Agency,
         CIA]