Definition
DIVERSE VECTOR AREA
In a radar environment, that area in which a prescribed departure route is not required as the only suitable route to avoid obstacles. The area in which random radar vectors below the MVA/MIA, established in accordance with the TERPS criteria for diverse departures, obstacles and terrain avoidance, may be issued to departing aircraft.
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).