Definition of deconfliction
military
: coordination of flights, maneuvers, etc. between groups especially in areas where overlapping operations are occurring in order to reduce the risk of accidents or incidents
… American officials insist that there is no coordination other than deconfliction, or making sure that their aircraft do not threaten each other.— Anne Barnard and Eric Schmitt Deconfliction is how friendly forces keep out of each other's way.— John R. Bolton
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Merriam-Webster unabridged
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Time Traveler for deconfliction
The first known use of deconfliction was in 1978
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