From Longman Dictionary of Contemporary Englishcounterintelligencecoun‧ter‧in‧tel‧li‧gence /ˌkaʊntərɪnˈtelədʒəns/ noun [uncountable] PGPMaction that a country takes in order to stop other countries discovering its secrets
Examples from the Corpus
counterintelligence• If counterintelligence becomes the overriding mission, the obvious answer is the solution first offered by Sen. 