An official, systematic search for facts to determine whether a person(s) is engaged in activities that may be injurious to US national security or advantageous to a foreign power. See also counterintelligence. (JP 2-01.2)
COUNTERINTELLIGENCE INVESTIGATION
Meaning of COUNTERINTELLIGENCE INVESTIGATION in English
DOD English dictionary of military terms. Английский словарь военных терминов DOD. 2012