| Meaning | The operation of gathering information about an enemy / enemy. |
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| Synonyms | intelligence, intelligence operation |
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| Narrower | clandestine operation | An intelligence operation so planned and executed as to insure concealment |
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| counterintelligence | intelligence activities concerned with identifying and counteracting the threat to security posed by hostile intelligence organizations or by individuals engaged in espionage or sabotage or subversion or terrorism |
| current intelligence | intelligence of all types and forms of immediate interest |
| overt operation | The collection of intelligence openly without concealment |
| reconnaissance, reconnaissance mission | The act of reconnoitring (especially to gain information about an enemy / enemy or potential enemy / enemy) |
| signals intelligence, SIGINT | intelligence information gathered from communications intelligence or electronics intelligence or telemetry intelligence |
| spying, undercover work | The act of keeping a secret watch for intelligence purposes |
| strategic intelligence | intelligence that is required for forming policy and military plans at national and international levels |
| tactical intelligence, combat intelligence | intelligence that is required for the planning and conduct of tactical operations |
| Broader | information gathering | The act of collecting information |
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| Spanish | operación de inteligencia |
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| Catalan | intel·ligència, operació d'intel·ligència |
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