対たい地ち接せっ近きん警けい報ほう装そう置ちたいちせっきんけいほうそうちMeanings1nounground proximity warning system; GPWSaviation›Aviation safety system that alerts pilots when the aircraft is in danger of flying into the ground or an obstacle.対たい地ち接せっ近きん警けい報ほう装そう置