Definition of "counterespionage" [counterespionage]

• Espionage undertaken to detect and counteract enemy espionage. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "JACOBSON: Well, I don't know specifically, but I will say that all members of the U.S. military are trained in what's called counterespionage, counterintelligence activities, in terms of being able to look at suspicious activities, things that may not seem right, such as someone who doesn't have access to classified information seeking out that information."
• ""counterespionage" team to oversee an internal investigation in case sensitive private documents at the bank become public, the newspaper said."
• ""The nations of China and Russia, through their intelligence services and through their corporations, are attacking our research and development," said U.S. counterespionage chief Robert Bryant."