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black op

noun
1.
Often, black ops. a secret mission or campaign carried out by a military, governmental, or other organization, typically one in which the organization conceals or denies its involvement: Some national intelligence agencies use black ops to undermine enemy governments.
The company even resorted to an industrial black op to steal secrets from its competitor.
Also, black operation.
Origin
1940-1950
1940-50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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