counterintelligence /ˌkaʊntɚrɪnˈtɛləʤəns/ noun /ˌkaʊntɚrɪnˈtɛləʤəns/
noun
Learner's definition of COUNTERINTELLIGENCE
[noncount] formal
: activity meant to hide the truth from an enemy or to prevent the enemy from learning secret information反情报行动;反间谍活动 —
often used before another noun常用于另一名词前