activities designed to detect and counteract enemy espionage
WordReference Random House Learner's Dictionary of American English © 2025
coun•ter•es•pi•o•nage /ˌkaʊntərˈɛspiəˌnɑʒ, -nɪdʒ/USA pronunciation
n. [uncountable]
WordReference Random House Unabridged Dictionary of American English © 2025- Government, Militarythe detection of, and steps or measures taken against, enemy spying.
coun•ter•es•pi•o•nage
(koun′tər es′pē ə näzh′, -nij),USA pronunciation n.
- Government, Militarythe detection and frustration of enemy espionage.
- counter- + espionage 1895–1900
Collins Concise English Dictionary © HarperCollins Publishers::
'counterespionage' also found in these entries (note: many are not synonyms or translations):