[koun-ter-in-tel-i-juh
ns] 
| 1. | the activity of an intelligence service employed in thwarting the efforts of an enemy's intelligence agents to gather information or commit sabotage. |
| 2. | an organization engaged in counterintelligence. |
| coun·ter·in·tel·li·gence (koun'tər-ĭn-těl'ə-jəns) n. The branch of an intelligence service charged with keeping sensitive information from an enemy, deceiving that enemy, preventing subversion and sabotage, and collecting political and military information. |