- a government agency or department that conducts intelligence or counterintelligence operations
WordReference Random House Learner's Dictionary of American English © 2017
- Governmentthe branch of governmental service that conducts secret investigations, esp. investigations into the military strength of other nations.
- Government(caps.) the branch of the U.S. Department of the Treasury charged chiefly with the discovery and apprehension of counterfeiters and with providing protection for the president and the president's immediate family.
- Governmentsecret work for a government, esp. espionage.