空くう挺てい降こう下か地ち域いきMeaningsNoun1. drop zoneKanji used空empty air挺counter for tools降descend下below地ground域regionComposed of空くう挺ていairborne (troops, operation, etc.)Prenominal降こう下かdescent; fall; drop; (atmospheric) depression; passing down (of an order, decree, etc.)Noun地ち域いきarea; region; district; localityNoun