Definition of counterintelligence
: organized activity of an intelligence service designed to block an enemy's sources of information, to deceive the enemy, to prevent sabotage, and to gather political and military information
Recent Examples of counterintelligence from the Web
As with any counterintelligence investigation, this will also include an assessment of whether any crimes were committed.
The Justice Department’s criminal investigation into Manafort predated the 2016 election and the counterintelligence probe that in July began investigating possible collusion between Moscow and associates of Trump.
But US counterintelligence investigators were already looking into the Russian claims during the summer of 2016, before the public became aware of similar claims in a dossier created for political opponents of Trump by a former British spy.
The FBI's scrutiny of Kushner places the bureau's sprawling counterintelligence and criminal investigation not only on the doorstep of the White House, but the Trump family circle.
Scotland Yard’s counterintelligence division, which handles the security of the royal family, launched an investigation, which ultimately focused on Goodman and Mulcaire.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'counterintelligence'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of counterintelligence
COUNTERINTELLIGENCE Defined for English Language Learners
Definition of counterintelligence for English Language Learners
: activity meant to hide the truth from an enemy or to prevent the enemy from learning secret information
Seen and Heard
What made you want to look up counterintelligence? Please tell us where you read or heard it (including the quote, if possible).