CIAabbr. Central Intelligence AgencyAmerican Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.CIA abbreviation for (Government, Politics & Diplomacy) Central Intelligence Agency; a federal US bureau created in 1947 to coordinate and conduct espionage and intelligence activities Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014CIA or C.I.A., Central Intelligence Agency: a federal agency that coordinates U.S. intelligence activities. Cia. Company. [