Definition of counterespionage
: the activity concerned with detecting and thwarting enemy espionage
Examples of counterespionage in a sentence
He was involved in counterespionage against Germany in World War II.
First Known Use of counterespionage
COUNTERESPIONAGE Defined for English Language Learners
Definition of counterespionage for English Language Learners
: the activity of preventing or stopping enemies from spying
Learn More about counterespionage
Britannica.com: Encyclopedia article about counterespionage
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