Definition of "intelligence service" []

• A unit responsible for gathering and interpreting information about an enemy (noun)

WordNet. Princeton University. 2010.

• "In spook history, it also stands for (a) the Special Intelligence Service of theFBI, the WWII American overseas intelligence service in the Western Hemisphere; (b) the Signal Intelligence Service, the communications intelligence service of the United States Army; (c) Servizio Informazioni Segrete, the intelligence service of the Italian Navy."
• "The German intelligence service had been fairly accurate about conditions in Russian-occupied Poland, but badly at fault about those beyond the original Russian frontier."
• "In Massachusetts, the rebel intelligence service was run by Joseph Warren, who sat on the Committee of Public Safety and who, as mentioned, had drafted the Suffolk County Resolves."